Inmet Issues Red ‘Great Danger’ Rain Alerts for São Paulo, Rio, Minas and Paraná Through Tonight

Overview

• Two top-tier warnings cover more than 440 municipalities and remain in force from midnight until 23:59 on Thursday, March 12.
• Forecasts indicate rain above 60 mm per hour or 100 mm in a day and gusts of 60–100 km/h, with risks of river overflows, landslides, power outages and fallen trees.
• One alert spans metro São Paulo and Rio, the Vale do Paraíba, and the Campinas–Piracicaba corridor and parts of southern Minas; a second targets São Paulo’s south coast and areas of Paraná, including the Curitiba metro.
• Broader orange and yellow advisories persist in other regions such as Mato Grosso do Sul and Ceará, with MS reporting persistent rain, milder temperatures and localized flooding concerns.
• Authorities advise staying sheltered, avoiding flooded routes and unplugging electronics, while local actions and impacts include suspended classes in Petrópolis and damage and displacements reported in Peruíbe and Ubatuba.