Polar Cold Peaks in South as Heavy Rain Hits Southeast and Centre‑West

Overview

• A polar air mass reached its peak over Brazil's South, producing subzero temperatures and widespread frost with Urupema recording −3.62°C and several RS and SC stations at or below freezing.
• Persistent rain and instability lingered over the Southeast, where Rio de Janeiro saw intense downpours that caused local flooding, a landslide and the rupture of a water adductor in Rocinha after 64.6 mm fell in four hours.
• Goiânia experienced an unusually heavy June event that became the largest single‑day June rainfall since 1961, causing damage in the city including water infiltration at the Santa Casa hospital.
• National and state services including Inmet, Climatempo, Simepar and local alert systems issued cold, frost and heavy rain warnings and are maintaining 24‑hour monitoring to guide civil defense responses.
• Forecasts project continued convective rain in the North and parts of the Southeast over the next days and models show a possible new frontal system approaching late this week, which could raise flood and landslide risk again.