# Weather volatility in Paraná and South America

> Live situation record from CLSTR: https://clstr.news/situations/weather-volatility-in-paran
> Updated: 2026-08-21T23:32:28.000Z. Sources: 78. Developments: 2.

By August 23, 2026, weather patterns across South America continued to show extreme divergence. In Argentina, the National Meteorological Service (SMN) issued a yellow alert for extreme cold in Buenos Aires, southeast Entre Ríos, western Santa Cruz, and Tierra del Fuego, including the Malvinas Islands. While much of Argentina faces cold, Salta is bracing for a sharp temperature rise, with maximums potentially reaching 38°C. In Bolivia, Civil Defense monitors emergencies caused by heavy snow, rain, floods, and strong winds, affecting tens of thousands of families.

Brazil maintained its pattern of regional extremes. By August 30, the state of Paraná faced new alerts for storms, heavy rain, strong winds, and potential hail. The National Institute of Meteorology (Inmet) and Simepar reported that a cold front advancing through southern Brazil is interacting with a low-pressure system in Paraguay. 

Significant rainfall is expected between the West and East regions of Paraná, specifically from Campo Mourão to Londrina, with daily volumes potentially reaching 50 to 100 millimeters. Wind gusts could range from 60 to 100 km/h, with hail risks in the West and South. In the North, near the borders with São Paulo and Mato Grosso do Sul, gusts between 40 and 60 km/h may cause falling tree branches. Following this instability, temperatures in Paraná are expected to drop; for instance, Curitiba is forecast to see highs drop from 23°C toward 20°C as weather stabilizes.

## Claims

- Senamhi issued an orange hydrological alert for potential river overflows in La Paz, Cochabamba, Potosí, and Santa Cruz. (corroborated by 3 sources)
- Senamhi issued an orange alert for snowfalls in La Paz, Oruro, Potosí, and Cochabamba. (corroborated by 3 sources)
- Searpi is implementing prevention measures in Santa Cruz to mitigate El Niño impacts. (single source)
- Epsas reported water reserves at 72.4% for La Paz and El Alto. (single source)

## Timeline

### 2026-08-21: Extreme weather impacts South America and Europe

Extreme weather is impacting multiple regions: Argentina faces extreme cold alerts and heat spikes in Salta, Bolivia manages snow and flood emergencies, and Spain deals with high temperatures in the Basque area

78 sources. https://clstr.news/cluster/paran-weather-cold-mornings-and-rising-temperatures-expected

### 2026-08-13: Paraná weather shifts from severe storms to heat wave

Paraná faces extreme weather shifts, moving from severe windstorm alerts and heavy rain to a heat wave with temperatures exceeding 30°C expected by the weekend.

4 sources. https://clstr.news/cluster/paran-weather-shifts-from-severe-storms-to-heat-wave

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Cite as: Weather volatility in Paraná and South America. CLSTR, https://clstr.news/situations/weather-volatility-in-paran