Brazil Extends Weather Alerts for Heavy Rain and Southern Frost Risk

Overview

• National forecasters kept alerts in force Tuesday as Inmet maintained yellow warnings for intense rain across multiple states and local agencies expanded notices in Alagoas, which covered all municipalities, and in Pernambuco, which renewed alerts for 99 cities.
• Yellow alerts call for 20–30 mm of rain per hour or up to 50 mm in a day with winds of 40–60 km/h, while orange areas can see up to 100 mm in a day and gusts that approach 100 km/h.
• A cold front followed by polar air is driving a sharp cooldown in the South, with early Tuesday lows near 0–3°C in higher areas of Rio Grande do Sul and Santa Catarina and a formal frost risk issued for the morning hours.
• Rain and wind tied to the front are affecting parts of the Centre-South, with São Paulo under city and state cautions for downpours and gusts, Paraná under storm alerts that include isolated severe gusts, and Mato Grosso do Sul reporting a wetter, cooler start to the week.
• Piauí remains a focus for persistent downpours through Thursday, with yellow and orange alerts in effect and some spots forecast to reach 90–100 mm; officials urge residents to avoid sheltering under trees, unplug electronics, and call Civil Defense at 199 or Fire Department at 193 in emergencies.