Rio Grande do Sul hit by extratropical cyclone with 120 km/h winds FAST-MOVING
An extratropical cyclone, described as a “ciclone‑bomba”, formed between Uruguay and Rio Grande do Sul on 6 August 2026 and rapidly intensified (bombogenesis). The system brought severe weather to Brazil’s South and Southeast, prompting red‑alert warnings for wind speeds up to 120 km/h in Rio Grande do Sul and up to 100 km/h in São Paulo. Nine São Paulo regions were placed under red alert, and the state’s Defense Civil sent SMS warnings to residents of 24 municipalities. The storm caused one fatality in Montenegro (a motorcyclist struck by a falling tree) and a tornado was confirmed in Pedro Osório. Damage included widespread tree falls, roof loss, power outages and temporary suspension of classes in the Baixada Santista. Enel activated a contingency plan for the expected winds, and the Port of Santos halted operations as wind speeds reached 55 km/h, later resuming after conditions eased. A crisis cabinet was opened in São Paulo to coordinate emergency services, while a task‑force in Cachoeira do Sul attended to about 40 incidents of roof damage and blocked roads. Forecasts indicated continued strong gusts and heavy rain across Rio Grande do Sul, Santa Catarina, Paraná, Mato Grosso do Sul and the coastal areas of São Paulo and Rio de Janeiro through the weekend.
Entities: Cachoeira do Sul · Ciclone‑Bomb · Defesa Civil · Defesa Civil de São Paulo · Defesa Civil do Rio Grande do Sul · Enel · Governo de São Paulo · Rio Grande do Sul · São Paulo · Uruguay · William Minhoto
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [○ 1 SOURCE] Rio Grande do Sul was placed under a red‑alert warning for rain above 100 mm per day, winds over 100 km/h and hail. (c66be2f7-1692-4df3-b9c4-17f4bf5aaabb)
- [● 2 SOURCES] Enel activated a contingency plan in São Paulo due to expected winds up to 100 km/h. (article 062417bb)
- [○ 1 SOURCE] An extratropical cyclone (ciclone‑bomb) formed between Uruguay and Rio Grande do Sul on 6 August 2026. (c66be2f7-1692-4df3-b9c4-17f4bf5aaabb)
- [● 2 SOURCES] The Government of São Paulo activated a crisis cabinet to monitor the storm. (cca20725-53ff-42ae-8852-5d4edd9c8510)
- [● 3 SOURCES] Nine regions in São Paulo were placed under red alert for wind and rain. (multiple articles)
- [○ 1 SOURCE] Western and central‑west Santa Catarina were forecast to experience thunderstorms, strong gusts, occasional hail and temperatures between 3 °C and 24 °C. (4fa37ff1-57c8-49cf-856e-9d62ff20bc53)
- [○ 1 SOURCE] The storm’s rapid intensification is described as bombogenesis and is difficult to predict. (c66be2f7-1692-4df3-b9c4-17f4bf5aaabb)
- [○ 1 SOURCE] Defesa Civil of Cachoeira do Sul recorded about 40 incidents, including roof damage, fallen trees and power outages. (50309600-f488-4d09-b42a-edd421a3c4ed)
- [○ 1 SOURCE] A tornado was confirmed in Pedro Osório, Rio Grande do Sul. (article 2fc842c1)
- [● 2 SOURCES] Wind gusts reached up to 120 km/h in Rio Grande do Sul. (article 2fc842c1)
- [○ 1 SOURCE] One person died after being hit by a falling tree in Montenegro, Rio Grande do Sul. (article 2fc842c1)
- [● 3 SOURCES] An extratropical cyclone formed between Uruguay and Rio Grande do Sul on 6 August 2026. (multiple articles)