Brazil Faces Dual Weather Threat: Heavy-Rain Alerts and Rare October Cold in São Paulo

Overview

• Inmet maintained multi-state warnings for intense rain and strong winds through Tuesday morning, forecasting 20–100 mm of rain per day and gusts up to 100 km/h, with specific alerts covering all of Roraima and most of Piauí until 10 a.m. on Oct. 21.
• São Paulo logged 11.2°C on Monday, the city’s lowest October reading since 2014, as state authorities issued a cold alert and activated emergency shelter and low-temperature operations for people on the streets.
• The Brazilian Navy issued a ressaca warning for the Rio de Janeiro coast with waves up to 3 meters, prompting the precautionary closure of the Avenida Niemeyer cycle path.
• Weather disruptions included 17 flight departures canceled in Brasília, diversions and delays at the airport, and civil defense reports of risk incidents and notable rainfall totals in Salvador and other parts of Bahia.
• Forecasts indicate cold mornings lingering in the South and Southeast with a gradual warming trend from midweek, while pockets of heavy, convective rain persist in parts of the North, Northeast and Center-West.