Overview

• Climatempo and Inmet project the hot episode from Sept. 18–22 with temperatures 5°C above average, including 38–40°C in parts of Goiás, Minas Gerais and Piauí, and potential peaks above 40°C in Cuiabá, Campo Grande, Goiânia, Brasília and Palmas.
• São Paulo state escalated wildfire response with a Crisis Cabinet under Operação SP Sem Fogo, and Campinas raised its fire-risk level to emergency as relative humidity falls to critical levels.
• Rio Grande do Sul faces severe weather from Friday through Sunday, with heavy rain, hail risk and an oceanic extratropical cyclone driving wind gusts that may exceed 100 km/h, according to state authorities and Climatempo.
• Forecasts indicate a weekend warm-up in São Paulo city with highs near 33°C before the front arrives Monday, when conditions turn stormy with strong winds and widespread rain.
• Inmet expects the front to sweep across the South, Southeast and parts of the Center-West and North through Sept. 24, followed by colder air with possible frost in the South, as an emerging La Niña points to a volatile spring.