Overview

• Santa Catarina faces several days of heavy rain, with 50–100 mm possible through October 4 and a risk of urban flooding, especially around Greater Florianópolis.
• Inmet keeps Paraná under a statewide storm alert through Thursday morning, forecasting up to 50 mm of rain, winds near 60 km/h and the possibility of hail.
• After the Distrito Federal measured an 8% relative humidity reading on September 30, Inmet issued a new warning that values may drop below 12%, elevating health and wildfire risks.
• Large swaths of the Southeast and Centro‑West are forecast to remain very hot and dry, with interior temperatures near 40°C and relative humidity falling to critical levels.
• October outlooks from national and state agencies project a hot, dry first half of the month, with more frequent showers and afternoon storms developing in the second half.