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Porto Alegre and Rio Grande do Sul flood mitigation updates

Updated 13 times since CLSTR started tracking revisions of this situation.

What changed

2026-10-11 03:22 UTC → 2026-10-27 01:35 UTC · added removed

Authorities in Porto Alegre and Rio Grande do Sul continue to manage extreme weather risks through infrastructure projects and emergency monitoring. In Porto Alegre, flood protection gates for polders 7 and 8 are complete, involving an investment of R$ 66 million for engineering, equipment, and floating pumps to return rainwater to the Gravataí River. The Municipal Department of Water and Sewage (Dmae) is planning a R$ 300 million definitive protection project. Additionally, work continues at project for this area, including two new pumping stations. Additional resilience measures include the installation of 8km of mobile FlexMac DT barriers in the Guarujá neighborhood and a R$ 18 million dual power supply project for three major water treatment plants to ensure energy security. At the Usina do Gasômetro to install Gasômetro, specialized sealing structures costing nearly R$ 700,000 are being installed to mitigate prevent flooding if the Guaíba River reaches 4.5 meters. Hydrological risks remain significant. As of October 10, the Guaíba River at Cais do Centro Histórico was recorded at 2.18 meters, following a slow downward trend. Throughout October, levels have consistently stayed above 2 meters. On October 2, the river approached the 2.5-meter alert threshold due to high discharge from the Caí, Jacuí, and Taquari rivers. While the level briefly dropped below 2 meters on October 8, it has since risen again. The overflow threshold is set at 3 meters. Meteorological specialist Luiz Fernando Nachtigall noted that sustained high levels are primarily driven by the Jacuí River, River. In the Guaíba’s main contributor. Due to state, the Jacuí’s scale, significant discharge from late September continues Taquari River has recently begun to reach Porto Alegre and Eldorado do Sul. Forecasts suggest the Guaíba will remain high, particularly with more rain expected in the northern part of the state. Recovery efforts also continue for historic sites, including internal restoration works recede slowly after peaking at the Porto Alegre Public Market to repair damage from the May 2024 floods, supported by a R$ 944,000 contract from 23.3 meters in Lajeado, though it remains above the National Institute of Historic and Artistic Heritage (Iphan). flood threshold.

Versions

  1. 2026-10-27 01:35 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  2. 2026-10-11 03:22 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  3. 2026-10-07 17:43 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  4. 2026-10-06 21:29 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  5. 2026-10-06 01:24 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  6. 2026-10-05 22:35 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  7. 2026-10-05 03:45 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  8. 2026-10-02 02:53 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  9. 2026-09-30 18:57 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  10. 2026-09-30 17:51 UTC Porto Alegre and Rio Grande do Sul flood mitigation updates
  11. 2026-09-27 23:55 UTC Porto Alegre flood mitigation and infrastructure updates
  12. 2026-09-23 19:45 UTC Porto Alegre flood and utility infrastructure improvements
  13. 2026-09-12 22:12 UTC Porto Alegre flood and utility infrastructure improvements
  14. 2026-09-01 15:05 UTC Porto Alegre flood and utility infrastructure improvements

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