Rio Enters Heat Protocol Level 3 as Southeast Brazil Bakes and São Paulo Flags Storm Risk

Overview

• INMET forecasts peak temperatures of 39°C on Saturday and up to 40°C on Sunday and Monday in Rio, with widespread heat across the Southeast.
• Rio activated Protocolo de Calor level 3 late Saturday morning, indicating sustained 36°C–40°C heat expected for at least three consecutive days.
• The Rio state health intelligence center (CIS/SES-RJ) warns of severe excess heat in multiple municipalities from Sunday, with the capital joining Monday and Guapimirim reaching the extreme level by Tuesday.
• Authorities opened 27 state UPA hydration points, reinforced SAMU 192 with rapid-response units, and Cedae is distributing 10,000 liters of chilled water along Copacabana and Aterro do Flamengo.
• São Paulo’s Civil Defense expects an extratropical cyclone to drive a front Saturday–Sunday that could bring isolated strong storms along the Paraná border and the east coast, while heat persists including up to 38°C in the Baixada Santista with higher rain chances from Tuesday.