# Rio Grande do Sul flood alerts continue > Live situation record from CLSTR: https://clstr.news/situations/rio-grande-do-sul-flood-evacuations > Updated: 2026-08-15T20:45:07.000Z. Sources: 71. Developments: 4. In late July 2024, the Brazilian Geological Service warned that the Guaíba River in Porto Alegre could reach the 2.60 m alert level and possibly the 3 m flood benchmark. River measurements on 29 July showed levels around 2.48–2.54 m, prompting civil-defence authorities to raise the hydrological alert to orange. Tributaries such as the Taquari, Caí, Gravataí, and Sinos also exceeded local flood thresholds, with over 100 residents displaced in towns like Taquara and Rolante. By 31 July 2024, the Guaíba rose to 2.58 m at the Cais Mauá station, extending the orange alert to the Arquipélago neighbourhood and riverside districts. The nearby Rio dos Sinos surged to 6.93 m in Novo Hamburgo and 5.22 m in São Leopoldo. A similar episode re-emerged in July 2026. The Guaíba reached 2.58 m at Cais Mauá, prompting the Defesa Civil to maintain an orange hydrological warning. Authorities noted that strong southern winds could cause brief spikes and localized flooding, particularly in the Arquipélago district and the islands of Pintada, Marinheiros, and Flores. While water levels began a slow recession, streets remained partially inundated. In the surrounding region, the Rio Paranhana rose above 5.5 m, leading to the evacuation of over 50 residents in Taquara. Although a temporary shelter in the Association of Motorists was later deactivated as levels fell, municipal teams remained on standby. In Porto Alegre, a vehicle was reported submerged in Lago Guaíba near the Ipanema waterfront, though no injuries were confirmed. ## Claims - The Guaíba River may reach the alert level of 2.60 m in Porto Alegre by Friday, 31 July. (corroborated by 23 sources) - Simulations indicate rising water levels in the Jacuí, Sinos and Gravataí rivers. (corroborated by 23 sources) - Civil Defense recorded the Guaíba River level above 2 m on Wednesday night in Porto Alegre. (corroborated by 23 sources) - There is a possibility that the Guaíba River could reach the flood level of 3 m. (corroborated by 21 sources) - Rainfall in the headwaters of tributary rivers is decreasing while water levels continue to rise in the main river and Delta do Jacuí. (corroborated by 21 sources) - No extreme flood event comparable to the historic flood of May 2024 is forecast for the coming days. (corroborated by 20 sources) - The Service Geológico do Brasil issues daily monitoring bulletins on the Guaíba River levels. (corroborated by 14 sources) - The Civil Defense of Rio Grande do Sul issued red and yellow hydrological alerts for the Guaíba River and deployed mobile command posts on the islands of Porto Alegre. (corroborated by 6 sources) - The Guaíba River reached a level of 2.54 m on 31 July in Porto Alegre. (corroborated by 4 sources) - Defence Civil raised the hydrological alert for the Guaíba River to orange level. (corroborated by 3 sources) - The Caí River rose to about 13.08 m in São Sebastião do Caí, prompting the evacuation of 27 families. (corroborated by 2 sources) ## Timeline ### 2026-08-15: Porto Alegre: Car becomes submerged in Lago Guaíba A Fiat Uno became nearly submerged in Lago Guaíba near the Ipanema waterfront in Porto Alegre on Saturday night; no injuries have been confirmed. 2 sources. https://clstr.news/cluster/porto-alegre-car-becomes-submerged-in-lago-guaba ### 2026-07-31: Porto Alegre raises alert as Guaíba River nears flood level Guaíba River in Porto Alegre hit 2.58 m, prompting an orange alert and warnings of possible flood spikes from strong southern winds, with vulnerable islands and Arquipélago district under close monitoring. 8 sources. https://clstr.news/cluster/porto-alegre-flood-risk-rises-as-rio-guaba-nears-alert-level ### 2026-07-29: Rio Guaíba nears flood‑alert level in Porto Alegre as waters keep rising Rio Guaíba rose to 2.54 m, near the 2.60 m flood‑alert threshold; orange alert issued; over 100 displaced in Taquara and about 1,000 affected in Rolante. 64 sources. https://clstr.news/cluster/rio-ca-flood-forces-evacuations-in-so-sebastio-do-ca-brazil ### 2026-07-29: Taquara, Brazil flood forces evacuations and closes temporary shelter Flooding in Taquara, Brazil saw the Rio Paranhana rise above 5.5 m, prompting the evacuation of 50 residents and the later closure of a temporary shelter. 3 sources. https://clstr.news/cluster/taquara-brazil-flood-forces-evacuations-and-closes-temporary-shelter --- Cite as: Rio Grande do Sul flood alerts continue. CLSTR, https://clstr.news/situations/rio-grande-do-sul-flood-evacuations