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Rio Grande do Sul flood evacuations

Updated 3 times since CLSTR started tracking revisions of this situation.

What changed

2026-07-30 10:57 UTC → 2026-07-30 13:38 UTC · added removed

In late March, rising waters in Taquara forced the evacuation of more than 50 residents from the Santa Maria neighbourhood after the Rio Paranhana surged past 5.5 m. Families were taken to a temporary shelter at the Association of Motorists, which was later deactivated once the river receded. A month later, heavy rain pushed the Rio Caí in São Sebastião do Caí above its flood threshold, reaching 12.25 m on 29 April. Municipal civil‑defence officials moved about 60 people from 27 families to an emergency gymnasium shelter and activated a regional crisis office to coordinate the response across nearby towns. Authorities continued to monitor the situation as other rivers, including the Guaíba, also rose above critical levels. In late July 2026, the Brazilian Geological Service warned that the Guaíba River in Porto Alegre could reach its alert level of 2.60 m by 31 July and possibly climb to the flood level of 3 m. State civil‑defence reported the river already above 2 m, issued yellow and red hydrological warnings, and deployed mobile command posts and monitoring teams on the city’s islands. Simulations showed rising levels in the Jacuí, Sinos and Gravataí tributaries. Meanwhile, the Caí River rose to about 13 m in São Sebastião do Caí, prompting the evacuation of 27 families. On Later on 29 July, the Serviço Geológico do Brasil reiterated the risk, noting forecast, confirming that despite decreasing rainfall at tributary headwaters, the Guaíba remained above 2 m and could reach River was likely to hit the 2.60 m alert level threshold by 31 July, with a further chance of hitting July and could still approach the 3 m flood threshold. Red and yellow alerts remain in force, but officials do not expect an extreme‑flood event comparable to the historic May 2024 inundation. Daily bulletins will continue benchmark. Civil‑defence agencies continued to monitor rainfall patterns and keep residents on alert, while daily bulletins tracked river levels and coordinate coordinated any necessary further evacuations.

Versions

  1. 2026-07-30 13:38 UTC Rio Grande do Sul flood evacuations
  2. 2026-07-30 10:57 UTC Rio Grande do Sul flood evacuations
  3. 2026-07-30 08:16 UTC Rio Grande do Sul flood evacuations
  4. 2026-07-30 01:39 UTC Rio Grande do Sul flood evacuations

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