Overview

• The sixth heat wave of 2025 began Thursday and is expected to run from September 18 to 22 with temperatures up to 5°C above normal.
• Climatempo projects readings above 40°C in parts of the Center‑West, North and Northeast, including cities such as Cuiabá, Campo Grande, Goiânia, Brasília and Palmas.
• Inmet forecasts 38°C to 40°C in areas of Goiás this weekend and signals a temperature decline as a stronger front moves in early next week.
• Piauí is under a yellow alert for low humidity, with Teresina forecast between 35°C and 39°C and guidance to hydrate and avoid peak sun exposure.
• Inmet also warns of severe storms in portions of the North with heavy rain near 50 mm per day and winds up to 60 km/h, while some zones of Minas Gerais may see intense heat without meeting the technical heat‑wave threshold.