Brazil Expands Heavy-Rain Alerts Through Weekend as Red Heatwave Grips the South

Overview

• Inmet is maintaining danger-level warnings for heavy rain, thunderstorms and strong gusts across the South, Southeast, Center-West and Northeast through Saturday, with 30–60 mm/hour downpours and 60–100 km/h winds.
• A red alert for a multi-day heatwave covers more than 500 inland municipalities in Rio Grande do Sul, Santa Catarina and Paraná through Saturday, with temperatures about 5°C above normal and heightened health risks.
• Porto Alegre, Florianópolis and Curitiba, as well as coastal areas, are outside the heat alert, which is focused on interior zones.
• Meteorologists cite a forming extratropical cyclone and a cold front expected to bolster the South Atlantic Convergence Zone, sustaining widespread instability and temporals.
• Emergency agencies issued targeted notices in multiple states — including São Paulo’s Baixada Santista and Vale do Ribeira, broader alerts across Ceará and 23 cities in Pernambuco — and advise hydration, avoiding flooded areas and calling 199 or 193 in emergencies.