# Brazil Aug-Sept 2026: Heatwaves, Drought & Severe Storms

> Live situation record from CLSTR: https://clstr.news/situations/rapid-succession-of-southern-cyclones-batter-brazils-southern-states-with-wind-rain-and-cold
> Updated: 2026-09-10T18:15:13.000Z. Sources: 773. Developments: 192.

By September 10, 2026, Brazil’s extreme weather patterns intensified, driven by an extratropical cyclone and El Niño conditions. In the South, Paraná experienced two confirmed tornadoes within 24 hours—one in Francisco Alves and another in Espigão Alto do Iguaçu—causing damage to schools and rural properties. Ten municipalities in Paraná reported incidents affecting approximately 583 people, alongside flooding and landslides in the Vale do Ivaí region.

In São Paulo, the situation remains critical. The capital has recorded 151.5% of its expected September rainfall in the first ten days, prompting the activation of a Crisis Cabinet. Some municipalities, such as Marília and Presidente Prudente, have suspended school activities. Severe storms and lightning have also caused significant power disruptions; in Rio Claro, fallen trees hit electrical lines, while Energisa recorded over 33,000 lightning strikes across 24 cities in the South-Southeast region.

Contrasting these conditions, the North and Center-West face extreme heat and dryness. Acre is experiencing temperatures up to 38°C with relative humidity dropping to between 25% and 35%. Similar patterns affect Rondônia, Amazonas, and Mato Grosso. In Minas Gerais, Uberaba faces high temperatures of 33°C and very low humidity of approximately 22%. Authorities continue to warn of risks including tornadoes, microbursts, heavy hail, and respiratory threats due to extreme temperature fluctuations.

## Claims

- An extratropical cyclone is expected to form near the coast of Rio Grande do Sul between Wednesday night and Thursday morning. (disputed by 10 sources)
- An extratropical cyclone is expected to form in the early hours of Thursday, August 20. (disputed by 5 sources)
- INMET is monitoring a low‑pressure system that could develop into a cyclone bomb affecting southern Brazil between 6‑8 August 2026. (corroborated by 27 sources)
- Wind gusts in Rio Grande do Sul could exceed 90 km/h, with possible gusts over 100 km/h offshore. (corroborated by 24 sources)
- Inmet issued an orange alert for wind gusts between 60 km/h and 100 km/h in parts of Rio de Janeiro and São Paulo. (corroborated by 21 sources)
- INMET issued a red alert for most of Rio Grande do Sul for severe storms on 6‑7 August. (corroborated by 20 sources)
- The Civil Defence of Rio Grande do Sul issued an orange alert warning of rain, hail and wind gusts over 90 km/h between 6 August and 7 August. (corroborated by 19 sources)
- A cold front associated with the system is expected to cause a temperature drop of 3 – 5 °C in southern Brazil. (corroborated by 18 sources)
- Rainfall could reach up to 200 mm in the Iguaçu basin between 5 and 10 August. (corroborated by 18 sources)
- The municipality of Rio de Janeiro entered Stage 2 due to predicted wind gusts of up to 90 km/h. (corroborated by 17 sources)
- The cyclone bomb may generate wind gusts up to 100 km/h in Rio Grande do Sul, Santa Catarina and São Paulo. (corroborated by 16 sources)

## Timeline

### 2026-09-10: Severe storms and lightning strikes cause power disruptions in Brazil

Heavy rains and lightning strikes have caused power disruptions and triggered weather alerts across parts of Brazil, including Rio Claro and the Adamantina region.

2 sources. https://clstr.news/cluster/severe-storms-and-lightning-strikes-cause-power-disruptions-in-brazil

### 2026-09-10: São Paulo activates Crisis Cabinet amid severe storm and tornado alerts

Severe weather alerts for tornadoes, high winds, and heavy rain have prompted the São Paulo government to suspend classes and activate a Crisis Cabinet as an extratropical cyclone approaches.

66 sources. https://clstr.news/cluster/brazil-weather-alert-storms-and-hail-threatened-in-minas-gerais-and-so-paulo

### 2026-09-10: Paraná and Campo Grande hit by tornadoes and severe storms

Tornadoes and severe storms have hit Paraná and Campo Grande, affecting hundreds of people and damaging infrastructure. The El Niño phenomenon is driving the increased risk of extreme weather in the region.

36 sources. https://clstr.news/cluster/paran-faces-severe-flooding-and-tornado-alerts

### 2026-09-10: Brazil weather: Heavy rain in south and intense heat in north

Brazil faces diverse weather extremes, including heavy rainfall and storm risks in the south and southeast, and intense heat with critical low humidity in the northern states like Acre.

10 sources. https://clstr.news/cluster/weather-extremes-forecast-for-araras-and-acre-in-brazil

### 2026-09-05: Weather alerts issued for Goiás and Bahia in Brazil

Severe weather alerts for heavy rain, lightning, and high winds have been issued for Goiás and over 120 cities in Bahia, Brazil, alongside warnings for low humidity.

3 sources. https://clstr.news/cluster/weather-alerts-issued-for-gois-and-bahia-in-brazil

### 2026-09-05: Severe storms and cold fronts cause widespread damage across Brazil and Mozambique

Severe storms and a cold front have caused widespread damage across Brazil and Mozambique, resulting in power outages for thousands, multiple injuries in Minas Gerais, and structural collapses in São Paulo.

59 sources. https://clstr.news/cluster/weather-alerts-issued-for-multiple-regions-in-portugal-and-brazil

### 2026-09-03: Brazil weather alert: Cold front and polar air bring storms and temperature drops

A cold front and polar air masses are bringing heavy storms, significant temperature drops, and low humidity alerts across Brazil's South, Southeast, and Center-West regions.

85 sources. https://clstr.news/cluster/brazil-weather-cold-front-brings-rain-and-humidity-alerts

### 2026-09-02: Brazil weather: Heat waves in Amazonas and cold fronts in São Paulo

Brazil faces diverse weather patterns, including a moderate heat wave alert in Amazonas and the arrival of a cold front bringing potential storms and rain to São Paulo.

11 sources. https://clstr.news/cluster/so-paulo-weather-cold-morning-followed-by-rising-temperatures

### 2026-08-31: Brazil health alerts rise amid Super El Niño weather patterns

Super El Niño weather patterns are prompting health warnings in Brazil, including intensified mosquito control in Hortolândia and increased respiratory risks in the South due to humidity and rain.

2 sources. https://clstr.news/cluster/brazil-health-alerts-rise-amid-super-el-nio-weather-patterns

### 2026-08-31: Brazil weather: El Niño to drive heavy rain and heat in September

El Niño is expected to drive intense rainfall and temperature fluctuations across Brazil in September, with NOAA predicting a 93% chance of very strong intensity this quarter.

27 sources. https://clstr.news/cluster/astrological-forecasts-predict-significant-planetary-shifts-in-september

### 2026-08-31: Southern Brazil faces severe storms and property damage

Severe storms and hail have damaged over 1,900 properties in Rio Grande do Sul and prompted emergency declarations in nine Santa Catarina municipalities. An extratropical cyclone continues to impact Brazil.

91 sources. https://clstr.news/cluster/southern-brazil-faces-severe-storms-and-flooding-risks

### 2026-08-29: Southern Brazil weather forecast warns of storms and wind

Southern Brazil faces unstable weather this weekend, with potential severe storms, heavy rain, and wind gusts in Santa Catarina and variable conditions including heat and light rain in Castro, Paraná.

3 sources. https://clstr.news/cluster/southern-brazil-weather-forecast-warns-of-storms-and-wind

### 2026-08-29: Southern Brazil storms cause fatalities and widespread damage

Severe storms, hail, and a confirmed tornado have caused two deaths and widespread damage across Rio Grande do Sul, Santa Catarina, and Paraná in Southern Brazil.

60 sources. https://clstr.news/cluster/southern-brazil-faces-flood-risks-from-cyclone-and-atmospheric-river

### 2026-08-27: Paraíba faces low humidity alert across 103 cities

Inmet has extended a yellow alert for low air humidity to 103 cities in Paraíba, with humidity levels expected to drop between 20% and 30%.

3 sources. https://clstr.news/cluster/paraba-faces-low-humidity-alert-across-103-cities

### 2026-08-27: Southern Brazil faces severe storms and fatalities as weather alerts expand

Severe storms in southern Brazil have caused fatalities and flooding risks, while Mozambique faces significant temperature fluctuations. Weather alerts remain active for multiple regions.

115 sources. https://clstr.news/cluster/brazil-weather-alerts-severe-storms-and-hail-risk-in-south-and-southeast

### 2026-08-27: São Paulo state under heatwave and low humidity alert

São Paulo state is under alert for a severe heatwave and critical low humidity from August 28 to 31, with temperatures potentially reaching 40°C and an increased risk of wildfires.

28 sources. https://clstr.news/cluster/so-paulo-faces-potential-historic-august-heatwave

### 2026-08-25: Severe weather alerts issued for Brazil and Portugal

Severe weather is hitting Brazil and Portugal. An extratropical cyclone threatens southern Brazil with heavy rain and floods, while northern Portugal faces orange alerts for storms and hail.

95 sources. https://clstr.news/cluster/brazil-weather-severe-rain-and-humidity-alerts-across-multiple-regions

### 2026-08-23: Brazil faces heat and drought impacts on health and farming

Drought and heat in Brazil are causing increased encounters with venomous animals in Várzea Grande and forcing farmers in Boa Vista to begin early irrigation to protect crops.

3 sources. https://clstr.news/cluster/brazil-faces-heat-and-drought-impacts-on-health-and-farming

### 2026-08-23: Brazil weather: Storms, heatwaves, and drought alerts

Brazil faces varied weather extremes, including storms and hail in the South and Southeast, intense heat and low humidity in the North and Northeast, and severe drought alerts across 11 states.

54 sources. https://clstr.news/cluster/paraba-weather-alerts-low-humidity-and-windstorm-warnings-issued

### 2026-08-20: Rio de Janeiro and São Paulo issued weather alerts for high winds

Inmet has issued orange alerts for Rio de Janeiro and São Paulo, warning of wind gusts up to 100 km/h. Rio has entered Stage 2 emergency status and closed all municipal parks as a precaution.

59 sources. https://clstr.news/cluster/weather-alerts-issued-for-so-paulo-and-rio-de-janeiro

### 2026-08-18: Paraíba wind alert: Inmet warns of gusts up to 60 km/h

Inmet has issued a yellow alert for windstorms in 50 municipalities in Paraíba, Brazil, with winds expected between 40 km/h and 60 km/h.

3 sources. https://clstr.news/cluster/paraba-wind-alert-inmet-warns-of-gusts-up-to-60-kmh

### 2026-08-18: Brazil weather: Cyclone and cold front bring wind and rain

Brazil faces extreme weather as an extratropical cyclone brings wind and rain to the South, while a cold front triggers windstorm alerts in São Paulo and Rio de Janeiro amid ongoing heatwaves.

96 sources. https://clstr.news/cluster/brazil-faces-high-temperatures-and-low-humidity-alerts

### 2026-08-16: Brazil faces intense heatwaves and critical low humidity alerts

Brazil faces intense heatwaves with temperatures over 40°C and critical low humidity in several states. A cold front is expected to bring rain and wind to the South and Southeast later this week.

48 sources. https://clstr.news/cluster/brazil-weather-high-temperatures-forecast-for-central-west-region

### 2026-08-11: Southern Brazil faces severe weather alerts and emergency declarations

Southern Brazil faces severe weather as Rio Grande do Sul declares emergencies in 19 towns. Alerts for heavy rain, hail, and 100 km/h winds continue across Rio Grande do Sul and Santa Catarina.

58 sources. https://clstr.news/cluster/rio-grande-do-sul-records-40-days-of-sub-zero-temperatures-amid-storm-alerts

### 2026-08-11: São Paulo issued red alert for intense heat wave

São Paulo is under a red alert for a heat wave from August 13 to 19, with temperatures up to 7°C above average and high wildfire risks due to extremely low humidity.

14 sources. https://clstr.news/cluster/weather-alerts-issued-for-so-paulo-and-minas-gerais

### 2026-08-09: Inmet issues low humidity alerts for Pernambuco and Paraíba

Inmet has issued yellow alerts for low air humidity (20% to 30%) affecting dozens of cities in the Sertão regions of Pernambuco and Paraíba, Brazil.

4 sources. https://clstr.news/cluster/paraba-receives-low-humidity-alert-for-73-municipalities

### 2026-08-07: Bahia, Brazil issues wind and dry‑air alerts for dozens of municipalities

Inmet warned 19 southern Bahia towns of strong winds and placed an orange alert for low humidity on 28 western municipalities, citing health risks and fire danger.

3 sources. https://clstr.news/cluster/bahia-brazil-issues-wind-and-dryair-alerts-for-dozens-of-municipalities

### 2026-08-04: Cyclone bomb drives severe storms and tornadoes in southern Brazil

A cyclone bomb formed over the South Atlantic, bringing 100‑130 km/h winds, heavy rain, hail and a tornado in southern Brazil, prompting red alerts and widespread power outages.

144 sources. https://clstr.news/cluster/brazils-southern-states-and-mato-grosso-do-sul-face-storm-and-heat-alerts

### 2026-08-04: Brazil sees heat spikes, rain showers and dry‑air alerts across multiple regions

Brazil faces a cold front in Acre, hot and rainy spells in the Southeast and South, dry‑air fire alerts in Marabá, and stable conditions in Apucarana.

12 sources. https://clstr.news/cluster/brazil-sees-hot-humid-conditions-across-acre-and-paran

### 2026-08-03: Bahia state issues wind and rain alerts for dozens of municipalities

Inmet warned of strong winds for over 80 Bahia municipalities, while Inema kept a rain alert for 25 southern municipalities after heavy precipitation, urging caution and emergency preparedness.

4 sources. https://clstr.news/cluster/bahia-state-issues-wind-and-rain-alerts-for-dozens-of-municipalities

### 2026-08-01: Brazil braces for extreme heat and storm threats at start of August

Brazil faces extreme heat, low humidity and fire danger in the north and central regions, while the south confronts a cold front, strong winds and a possible cyclone, all intensified by a strong El Niño and a $

48 sources. https://clstr.news/cluster/rio-grande-do-sul-hit-by-severe-storms-and-wind-alerts-amid-el-nio

### 2026-08-01: Inmet issues low‑humidity and wind alerts across Brazil

Inmet warned of low humidity (<30%) and strong winds across many Brazilian states, prompting civil‑defence alerts and health advice on hydration and fire safety.

16 sources. https://clstr.news/cluster/inmet-extends-wind-and-humidity-alerts-across-all-paraba-municipalities

### 2026-07-30: Brazilian agriculture hit by El Niño and heavy rains, raising food prices

El Niño in Goiás and heavy rains in Rio Grande do Sul threaten Brazil’s crops, push up food prices and may cost the government billions.

2 sources. https://clstr.news/cluster/brazilian-agriculture-hit-by-el-nio-and-heavy-rains-raising-food-prices

### 2026-07-29: Inmet issues low‑humidity alerts for 13 Brazilian states

Inmet issued orange low‑humidity alerts for 13 Brazilian states (12‑20 % humidity) and yellow alerts (20‑30 %), with temperatures up to 40 °C and wind warnings up to 60 km/h, raising fire and health risks.

28 sources. https://clstr.news/cluster/brazils-federal-district-records-hottest-dry-day-amid-nationwide-orange-humidity-alert

### 2026-07-25: Record heat spreads across Brazil’s southern and central states

Brazil faces a heat wave with temperatures up to 38‑40 °C across Santa Catarina, Goiás, Mato Grosso do Sul and Acre, dry conditions and low‑humidity health alerts.

16 sources. https://clstr.news/cluster/mato-grosso-do-sul-faces-extreme-heat-and-lowhumidity-alert-sunday

### 2026-07-25: Brazil's Municipal Association issues guide for El Niño 2026 impacts

ABM issues a free guide for municipalities as NOAA forecasts an 81 % chance of a very‑strong El Niño in late 2026; the guide details regional risks and emergency steps, while experts warn up to 10 % grain loss,

33 sources. https://clstr.news/cluster/el-nio-could-shave-up-to-10-off-brazils-grain-harvest-warns-fgv-expert

### 2026-07-24: Brazil reports numerous beach sections unsuitable for swimming

Brazilian states issue multiple beach alerts, citing E. coli contamination and naming dozens of unsuitable swimming spots across Alagoas, Natal, Bahia, Rio, and Paraíba.

15 sources. https://clstr.news/cluster/brazilian-surfer-maya-carpinelli-rides-giant-wave-at-tahitis-teahupoo

### 2026-07-21: Rio Grande do Sul floods leave over 1,200 displaced as rivers rise

Intense July rains in Rio Grande do Sul have flooded dozens of towns, displaced over 1,200 people, prompted emergency declarations, and raised river levels, while officials warn of worsening El Niño‑driven rain

112 sources. https://clstr.news/cluster/cold-front-triggers-severe-weather-alerts-across-southern-brazil

### 2026-07-21: El Niño prompts potential billions‑worth agricultural losses in Brazil

A strong 2026‑27 El Niño could trigger super‑supply of grains, lower prices and cause over R$ 13 bn losses in Bahia, with mixed impacts across Brazil’s regions.

14 sources. https://clstr.news/cluster/portugal-expects-rain-in-the-azores-and-milder-heat-as-europe-faces-up-to-45-c

### 2026-07-21: Rio de Janeiro issues maximum alert and bans swimming as strong El Niño drives unsafe beach water

Rio de Janeiro declared maximum alert, pre‑empted summer emergency plans for a strong El Niño, and warned that most Zona Sul beaches are unsafe for swimming after heavy rains.

12 sources. https://clstr.news/cluster/rio-de-janeiro-enjoys-hot-sunny-days-as-free-sunscreen-promotion-launches

### 2026-07-21: Low humidity alerts spark health warnings and fire risk across Brazil

Brazil faces 20‑30% humidity, high temps and fire risk; health agencies urge hydration, indoor activity limits, skin care and fire‑prevention measures.

18 sources. https://clstr.news/cluster/hot-temperatures-dominate-mato-grosso-while-belo-horizonte-experiences-mild-weather-on-july-21

### 2026-07-19: Rio Grande do Sul records July heat record as cold front approaches

Tramandaí hit a July record of 34.9 °C, part of an unseasonal heat wave across Rio Grande do Sul, before a cold front brings rain and temperatures down to 11‑22 °C later this week.

3 sources. https://clstr.news/cluster/rio-grande-do-sul-records-july-heat-record-as-cold-front-approaches

### 2026-07-19: Inmet issues yellow rain and wind alerts for Paraíba, Bahia and Paraná

Inmet placed yellow alerts on Paraíba, Bahia and Paraná, warning of up to 50 mm rain and strong winds, with guidance to avoid trees and stay safe.

11 sources. https://clstr.news/cluster/paraba-brazil-issues-rain-alert-for-86-towns-as-146-face-emergencies

### 2026-07-19: Brazil Braces for Unusual Heat and Storms as El Niño Strengthens

El Niño is causing an unusual Brazilian winter with heat up to 40 °C, severe storms, and a water‑crisis alert in Acre.

23 sources. https://clstr.news/cluster/el-nio-drives-heat-spikes-and-severe-storms-across-brazil

### 2026-07-19: Rio Grande do Sul hit by severe storms, flooding alerts and emergency declarations

Severe storms with 100 km/h winds and 100 mm+ rain hit Rio Grande do Sul, prompting orange‑red alerts, infrastructure damage, 19 displaced residents and emergency declarations in seven municipalities.

89 sources. https://clstr.news/cluster/northeast-brazil-coast-faces-cloudy-skies-and-possible-showers-on-sunday

### 2026-07-19: Southern Brazil Endures Summer Heat, Low Humidity and Strong Winds

Southern Brazil faces July heat above 30 °C, low humidity (down to 12 %) and strong winds up to 70 km/h, with health and fire alerts issued across several states.

25 sources. https://clstr.news/cluster/curitibas-historic-1975-snowfall-marks-51st-anniversary

### 2026-07-19: São Paulo civil defence issues fire‑risk alert amid dry spell

São Paulo civil defence has warned of extreme fire risk from July 19‑21 as humidity falls below 30 %, affecting central, west and east regions and prompting water‑supply concerns for several interior cities.

40 sources. https://clstr.news/cluster/so-paulo-state-issues-firerisk-alert-for-interior-regions

### 2026-07-18: Rio de Janeiro declares ten South Zone beaches unsafe for swimming this weekend

Inea marks ten Rio South Zone beaches unsafe for swimming this weekend, advises a 24‑hour post‑rain wait, and lists safe and unsafe spots in Rio and Niterói.

9 sources. https://clstr.news/cluster/rio-de-janeiro-declares-ten-south-zone-beaches-unsafe-for-swimming-this-weekend

### 2026-07-17: Nova Iguaçu boosts winter clothing drive after record low temperature

After recording its lowest temperature of the year (11.1 °C) on July 16, Nova Iguaçu intensified its Campanha do Agasalho, urging clean clothing and blanket donations at SEMAS, CRAS and CREAS to aid the needy,

19 sources. https://clstr.news/cluster/rio-de-janeiro-records-lowest-temperature-of-2026

### 2026-07-17: Brazil issues beach bathing safety warnings in Alagoas and Paraíba

Brazil’s environmental agencies report several beach sections in Alagoas and Paraíba unsafe for swimming due to high bacterial contamination, urging swimmers to avoid affected areas.

2 sources. https://clstr.news/cluster/brazil-issues-beach-bathing-safety-warnings-in-alagoas-and-paraba

### 2026-07-16: Heavy rains threaten wheat harvest in Southern Brazil

Frost caused limited wheat damage in Southern Brazil, but forecast heavy rains could flood soils, hinder field work and boost disease risk across Rio Grande do Sul, Paraná and parts of Santa Catarina.

2 sources. https://clstr.news/cluster/heavy-rains-threaten-wheat-harvest-in-southern-brazil

### 2026-07-16: Severe Storms Damage Over 20 Cities in Rio Grande do Sul

Storms with hail and 100 km/h winds damaged over 20 cities in Rio Grande do Sul, caused roof loss, power cuts and displaced 10 people; a fatality occurred in Salto, Uruguay, and Paraná saw an orange vendaval‑w­

74 sources. https://clstr.news/cluster/brazils-inmet-issues-rain-and-wind-alerts-for-alagoas-and-paraba

### 2026-07-15: Brazilian towns Araçatuba and Teresópolis prepare for dry‑season fire risk

Civil defense in Araçatuba and Teresópolis warned of low humidity‑driven fire risk and water‑supply strain, detailing emergency plans, equipment boosts and public safety advice.

2 sources. https://clstr.news/cluster/brazilian-towns-araatuba-and-terespolis-prepare-for-dryseason-fire-risk

### 2026-07-14: Campos do Jordão hits 1.3 °C record low as Brazil endures severe cold spell

Campos do Jordão hit 1.3 °C on 15 July 2026 – the state’s coldest this year – as a polar air mass drove record lows across São Paulo, Minas Gerais and other regions, prompting shelters and forecasts of gradual暖

20 sources. https://clstr.news/cluster/southeast-brazil-hit-by-polar-air-mass-record-low-of-11c-recorded

### 2026-07-14: Record Cold Wave Freezes Lakes in Rio de Janeiro’s Itatiaia National Park and Nova Friburgo

A cold front hit Rio de Janeiro state, with Itatiaia National Park reaching ‑11 °C and freezing a lake, while Nova Friburgo’s Pico da Caledônia saw 2.9 °C, 55 km/h winds and frozen water.

3 sources. https://clstr.news/cluster/record-cold-wave-freezes-lakes-in-rio-de-janeiros-itatiaia-national-park-and-nova-friburgo

### 2026-07-14: Inmet issues multiple weather alerts across Brazil as rain, wind and low humidity threaten hundreds of cities

Inmet has issued rain, wind, low‑humidity and frost alerts for dozens of states, affecting over a thousand Brazilian cities and urging safety precautions.

22 sources. https://clstr.news/cluster/bahia-issues-intense-rain-and-lowhumidity-alerts-for-hundreds-of-municipalities

### 2026-07-13: Brazil experiences sharp day‑night temperature swings and dry heat across several states

Brazil sees cold mornings and hot afternoons in Mato Grosso do Sul, sunny 24 °C in Araras, clouds then up to 36 °C in Cuiabá, rain ending Acre's drought, and dry, sunny conditions with highs of 26‑36 °C across,

8 sources. https://clstr.news/cluster/cuiab-and-araguari-face-hot-humid-midjuly-weather-in-brazil

### 2026-07-12: Cold wave prompts emergency shelters across São Paulo and Campo Grande

A cold front has driven temperatures to single‑digit Celsius in São Paulo and Campo Grande, prompting state alerts and the opening of emergency shelters for the homeless and vulnerable.

20 sources. https://clstr.news/cluster/so-paulo-cold-front-leads-to-metro-shelter-for-the-homeless

### 2026-07-11: Cold front brings sharp temperature drop and storms across southern Brazil

A polar air mass brings a sharp temperature drop, strong winds and severe thunderstorms across southern Brazil and neighboring countries, prompting alerts for heat‑related flooding and cold‑related health risks

65 sources. https://clstr.news/cluster/gois-brazil-faces-return-of-dry-conditions-after-brief-cold-front

### 2026-07-11: Rio de Janeiro braces for cold front with 3‑metre wave alert

A cold front brings rain, wind and a 3‑metre wave alert to Rio de Janeiro, prompting safety warnings for beaches and coastal towns.

12 sources. https://clstr.news/cluster/cold-front-brings-rain-and-strong-winds-to-rio-and-so-paulo

### 2026-07-11: Brazil's Inmet Issues Nationwide Storm, Rain, Temperature and Humidity Alerts

Brazil's Inmet issued nationwide alerts for storms, heavy rain, temperature drops and low humidity, affecting over 3,400 municipalities, including 86 cities in Paraíba.

2 sources. https://clstr.news/cluster/brazils-inmet-issues-nationwide-storm-rain-temperature-and-humidity-alerts

### 2026-07-11: Brazil's Mato Grosso region sees temps swing from 9°C to 34°C

A cold front drives Mato Grosso do Sul temps from 9°C to 34°C and brings rain, while Cuiabá sees lows of 17°C and highs up to 34°C, prompting a humidity alert.

6 sources. https://clstr.news/cluster/brazils-mato-grosso-region-sees-temps-swing-from-9c-to-34c

### 2026-07-11: Minas Gerais to stay dry this weekend before cold front; Maricá starts week rainy, clears by midweek

Minas Gerais will stay dry this weekend before a cold front brings brief rain on Monday; Maricá sees early week showers, then sunny, warmer weather by midweek.

5 sources. https://clstr.news/cluster/minas-gerais-to-stay-dry-this-weekend-before-cold-front-maric-starts-week-rainy-clears-by-midweek

### 2026-07-11: Campo Grande issues yellow storm alert as heavy rain and strong winds approach

Campo Grande and 77 municipalities in Mato Grosso do Sul are under a yellow storm alert for heavy rain (up to 50 mm) and winds of 40‑60 km/h, with safety advisories issued.

12 sources. https://clstr.news/cluster/mato-grosso-do-sul-faces-storm-alert-as-cold-front-triggers-heavy-rain-and-winds

### 2026-07-10: Brazil's coastal agencies issue weekend beach safety warnings in Salvador, João Pessoa and Pitimbu

Brazilian authorities warned of dangerous sea conditions in Salvador and declared four beach sections in João Pessoa and Pitimbu unsuitable for swimming this weekend.

2 sources. https://clstr.news/cluster/brazils-coastal-agencies-issue-weekend-beach-safety-warnings-in-salvador-joo-pessoa-and-pitimbu

### 2026-07-10: São Paulo state declares emergency in three cities as fire risk spikes

São Paulo state’s Civil Defense declared emergency in Barretos, Ribeirão Preto and Franca as human‑caused fire risk peaks, urging the public to avoid open flames and illegal balloon releases.

3 sources. https://clstr.news/cluster/so-paulo-state-declares-emergency-in-three-cities-as-fire-risk-spikes

### 2026-07-10: Eldorado do Sul declares emergency after severe storm displaces 720

Severe July storm in Rio Grande do Sul left 720 people homeless, destroyed roofs in Eldorado do Sul and prompted emergency declarations and further rain alerts across the southern states.

71 sources. https://clstr.news/cluster/inmet-forecasts-rain-across-brazils-southern-states-this-weekend

### 2026-07-08: Cold front sweeps southern Brazil, triggering rain, frost and storms

A cold front brings frost, rain and thunderstorms to southern Brazil, with temperatures dropping to –5 °C and moderate flood risks in the south and cooler, wet weather in the southeast.

39 sources. https://clstr.news/cluster/southern-brazil-cold-snap-pushes-temperatures-below-zero-in-paran-and-santa-catarina

### 2026-07-08: Brazil sees cooler Rio temperatures and weaker winds in the northeast

A polar air mass keeps Rio de Janeiro cool with highs near 23 °C, while El Niño brings weaker winds and higher temperatures to Rio Grande do Norte's seasonal wind period.

3 sources. https://clstr.news/cluster/brazil-sees-cooler-rio-temperatures-and-weaker-winds-in-the-northeast

### 2026-07-08: Inmet issues low‑humidity yellow alerts for multiple Brazilian states

Brazil's Inmet issued yellow low‑humidity alerts for 53 municipalities in Rio Grande do Norte, 125 in Bahia and 39 cities in Paraíba, urging hydration, reduced outdoor activity and contact with civil defence.

4 sources. https://clstr.news/cluster/inmet-issues-lowhumidity-yellow-alerts-for-multiple-brazilian-states

### 2026-07-07: São Paulo civil defense declares fire emergency for holiday amid low humidity

São Paulo civil defense declared a fire emergency for the July holiday as humidity fell below 30 %, putting Barretos, Ribeirão Preto and Franca in emergency status and issuing red alerts for several interior ‑

10 sources. https://clstr.news/cluster/so-paulo-holiday-weather-shifts-from-dry-heat-to-cold-front

### 2026-07-06: Cold Front Hits Paraná While Goiânia Swings from 15°C to 31°C

Paraná faces a cold front with frosts and rain, while Apucarana stays dry at 10‑20 °C; Goiânia swings from 15 °C to 31 °C with low humidity and health warnings.

6 sources. https://clstr.news/cluster/cold-front-hits-paran-while-goinia-swings-from-15c-to-31c

### 2026-07-06: Brazilian locales Aquidauana and Alagoas experience firm weather with temperatures climbing to 32°C

Aquidauana sees a week of dry, firm weather with highs up to 31‑32 °C, while Alagoas expects clear skies and a 32 °C maximum on Tuesday, with no rain forecast.

2 sources. https://clstr.news/cluster/brazilian-locales-aquidauana-and-alagoas-experience-firm-weather-with-temperatures-climbing-to-32c

### 2026-07-06: Brazil weather outlook calls for sun in Minas Gerais, Salvador and other regions

INMET forecasts dry, sunny weather across Brazil with brief rain and winds in Salvador, hot 30 °C in Ituiutaba, and generally clear skies in Minas Gerais and the Southeast.

8 sources. https://clstr.news/cluster/sunny-start-expected-for-salvador-and-barreiras-in-brazil

### 2026-07-05: Brazil's central states face temperature extremes this week

Cuiabá sees clear skies and heat up to 38 °C, while Mato Grosso do Sul faces a cold front with lows of 8 °C and highs above 30 °C this week.

5 sources. https://clstr.news/cluster/brazils-central-states-face-temperature-extremes-this-week

### 2026-07-05: Cold front brings frost warnings across Southern Brazil

A polar air mass lowered temperatures to near‑zero in Southern Brazil, prompting frost warnings for farms, wind‑chill alerts on the coast and health advisories in Florianópolis.

18 sources. https://clstr.news/cluster/cold-front-drives-temperatures-to-6c-across-southern-brazil

### 2026-07-04: Brazilian Navy issues surf warning for Rio de Janeiro beaches

The Brazilian Navy warned of 2.5 m surf on Rio de Janeiro beaches from Saturday afternoon to Sunday evening, urging the public to avoid the water amid rain, cooler temperatures and a fan fest for a Brazil‑Norwe

2 sources. https://clstr.news/cluster/brazilian-navy-issues-surf-warning-for-rio-de-janeiro-beaches

### 2026-07-04: Rio de Janeiro issued surf warning with waves up to 2.5 m this weekend

Brazilian Navy warned of 2.5‑3 m waves on Rio’s coast Saturday‑Sunday, urging swimmers, surfers and fishermen to stay out; a cold front brings rain and cooler temps, with a Brazil‑Norway match scheduled at Copa

2 sources. https://clstr.news/cluster/rio-de-janeiro-issued-surf-warning-with-waves-up-to-25-m-this-weekend

### 2026-07-04: Rain and thunderstorms forecast for Brazil's North Region on Sunday

INMET forecasts rain and thunderstorms across Brazil's North Region on Sunday, with high temperatures (21‑37 °C) and elevated humidity, while the south remains clear.

2 sources. https://clstr.news/cluster/rain-and-thunderstorms-forecast-for-brazils-north-region-on-sunday

### 2026-07-04: Brazil's Northeast Coast Braces for Rain While Rio Grande do Sul Remains Dry This Weekend

INMET forecasts rain for Northeast Brazil’s coastal capitals on July 4, while Rio Grande do Sul stays dry this weekend before a new front brings showers early next week.

2 sources. https://clstr.news/cluster/brazils-northeast-coast-braces-for-rain-while-rio-grande-do-sul-remains-dry-this-weekend

### 2026-07-03: Inmet issues yellow rain and temperature alerts for dozens of cities across Brazil's North and Northeast

Inmet warned of intense rain and temperature drops across Brazil's North, Northeast and parts of the Southeast, issuing yellow alerts for dozens of cities including Pará, Ceará, Paraíba, Bahia and São Paulo.

18 sources. https://clstr.news/cluster/paraba-brazil-under-inmet-intense-rain-alerts-for-hundreds-of-municipalities

### 2026-07-02: Curitiba braces for sudden weekend cold front as temperatures plunge

A weekend cold front will lower temperatures in Curitiba to as low as 10 °C, bring clouds and light rain, with sunny conditions expected around the Brazil‑Norway World Cup match on Sunday.

2 sources. https://clstr.news/cluster/curitiba-braces-for-sudden-weekend-cold-front-as-temperatures-plunge

### 2026-07-02: Cold Front Triggers Fog and Yellow Alerts Across Minas Gerais

A cold front in Minas Gerais brings fog on key highways and a yellow alert for low temperatures in 178 cities, prompting driver safety advisories and civil‑defense warnings.

3 sources. https://clstr.news/cluster/cold-front-triggers-fog-and-yellow-alerts-across-minas-gerais

### 2026-07-01: Southern Brazil braced for polar front bringing freezing temperatures and rain

A polar front hit southern Brazil, causing near‑freezing temperatures, frost alerts and rain, while central regions see heat spikes above 30 °C.

41 sources. https://clstr.news/cluster/paran-faces-frost-risk-as-cold-front-moves-in

### 2026-06-30: F2 tornado hits Reserva, Paraná as cold front rattles Southern Brazil

A tornado rated F2 struck Reserva, Paraná, with 200 km/h winds damaging 11 houses and displacing about 50 people, while a cold front brought heavy rain, hail, strong winds and sub‑zero temperatures across south

45 sources. https://clstr.news/cluster/paran-tornado-hits-reserva-prompting-statewide-red-storm-alert

### 2026-06-29: Brazil experiences rainy storms in Paraná and dry heat in São Paulo

Paraná faces heavy rain and strong winds, São Paulo sees dry heat, while Ubatuba awaits a cold front with showers and rough seas.

4 sources. https://clstr.news/cluster/brazil-experiences-rainy-storms-in-paran-and-dry-heat-in-so-paulo

### 2026-06-28: Paraná, Brazil hit by severe hailstorm that blankets farms and homes in ice

Severe hailstorm in Paraná, Brazil on 28‑29 June 2026 dropped egg‑sized hail, created ice layers up to 30 cm, damaged homes and farms, caused power outages, and prompted relief efforts.

4 sources. https://clstr.news/cluster/paran-brazil-hit-by-severe-hailstorm-that-blankets-farms-and-homes-in-ice

### 2026-06-28: Southern Brazil hit by heavy rains, storms and a cold front as El Niño intensifies

Heavy rains, storms and a cold front are sweeping southern Brazil, with flood alerts, power outages and El Niño‑driven excess rainfall expected through September.

48 sources. https://clstr.news/cluster/isolated-rain-expected-in-piau-and-southern-brazil-on-sunday

### 2026-06-27: Rio Grande do Sul hit by extreme rains, bridge collapse and school closures

Extreme rain in Rio Grande do Sul dumped up to 200 mm, wrecked a bridge, flooded homes, blocked roads and forced school closures across multiple towns.

39 sources. https://clstr.news/cluster/paran-brazil-braces-for-week-of-rain-and-thunderstorms-as-cold-front-moves-in

### 2026-06-26: João Pessoa battles intense rainstorms with civil‑defense alerts and governor’s on‑site response

Intense rain alerts hit João Pessoa, prompting civil‑defense monitoring, a governor’s visit to flooded neighborhoods, health warnings on flu, and a final‑week HPV vaccination drive.

29 sources. https://clstr.news/cluster/heavy-rains-flood-pernambuco-cut-water-supply-to-eight-cities

### 2026-06-25: Central-West Brazil Forecast Calls for Isolated Showers and Warm Temperatures

Inmet forecasts mostly cloudy skies and isolated rain for Central-West Brazil on 26 May, with warmer, steadier conditions and possible thunderstorms in Mato Grosso do Sul on 27 May.

7 sources. https://clstr.news/cluster/central-west-brazil-forecast-calls-for-isolated-showers-and-warm-temperatures

### 2026-06-25: Hailstorms damage vineyards in Portugal's Douro and coffee farms in Brazil

Hailstorms have ravaged vineyards in Portugal's Douro region and coffee plantations in Brazil's Minas Gerais, prompting emergency assessments and recovery measures.

2 sources. https://clstr.news/cluster/hailstorms-damage-vineyards-in-portugals-douro-and-coffee-farms-in-brazil

### 2026-06-25: Rio de Janeiro sees rain Thursday‑Friday, sunshine expected for weekend

Rain is forecast for Rio de Janeiro and nearby towns on Thursday‑Friday, followed by sunny, warmer weekend weather with highs up to 27 °C.

6 sources. https://clstr.news/cluster/rio-de-janeiro-sees-rain-thursdayfriday-sunshine-expected-for-weekend

### 2026-06-25: Heavy rains flood streets in Monte Mor and Campinas, Brazil

Heavy rain in São Paulo state caused the Capivari River to flood streets in Monte Mor and toppled trees in Campinas, with no injuries reported.

3 sources. https://clstr.news/cluster/heavy-rains-flood-streets-in-monte-mor-and-campinas-brazil

### 2026-06-24: Brazil sees widespread rain, record cold and El Niño‑driven impacts

Inmid June 2026 Brazil faces rain across most regions, record cold in the South and El Niño‑driven flood and drought risks, prompting alerts and insurer preparations.

38 sources. https://clstr.news/cluster/so-paulo-records-lowest-june-maximum-temperature-in-30-years

### 2026-06-24: Brazil prepares for polar cold front as Inmet rules out cyclone‑bomb

Inmet dismisses a cyclone‑bomb threat and warns that a polar cold front will hit southern Brazil, bringing near‑zero temperatures, rain and sub‑zero lows in Santa Catarina and Paraná, while the front stretches

5 sources. https://clstr.news/cluster/7000km-cold-front-sweeps-across-brazil-and-neighboring-amazon-regions

### 2026-06-24: São Paulo heavy rain triggers building collapses and fatalities

Heavy rain in São Paulo caused building collapses, one death, injuries and dozens displaced, prompting emergency shelters and civil‑defence alerts.

4 sources. https://clstr.news/cluster/so-paulo-heavy-rain-triggers-building-collapses-and-fatalities

### 2026-06-24: Heavy rain drenches São Paulo and Guarulhos, disrupting traffic

Heavy rain hit São Paulo, slowing traffic, and a forecast calls for similar downpours and cold temperatures in Guarulhos, prompting safety warnings.

2 sources. https://clstr.news/cluster/heavy-rain-drenches-so-paulo-and-guarulhos-disrupting-traffic

### 2026-06-23: Brazil's Inmet issues low‑humidity and heavy‑rain alerts across Northeast states

Inmet issued low‑humidity alerts for Bahia and heavy‑rain alerts for Paraíba and Alagoas, plus forecasts of clouds and showers across Brazil's Northeast.

7 sources. https://clstr.news/cluster/northeast-brazil-sees-cooler-temperatures-and-scattered-rain

### 2026-06-23: Cold wave hits southern Brazil, prompting alerts in Paraná and Joinville

A polar air mass brings -5 °C to Paraná and 7 °C lows to Joinville, prompting cold alerts and shelter operations for vulnerable residents in southern Brazil.

2 sources. https://clstr.news/cluster/cold-wave-hits-southern-brazil-prompting-alerts-in-paran-and-joinville

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Cite as: Brazil Aug-Sept 2026: Heatwaves, Drought & Severe Storms. CLSTR, https://clstr.news/situations/rapid-succession-of-southern-cyclones-batter-brazils-southern-states-with-wind-rain-and-cold