"Emergency" fire risk across almost all of São Paulo state: Heatwave and dryness to continue in the north this week

The state of São Paulo, Brazil, reached the highest fire danger level of "emergency (purple)" across almost the entire state on Monday, October 6, 2025. The combination of dry conditions and extreme heat is expected to result in relative humidity of less than 30%. The state disaster prevention authorities anticipate that the emergency will continue, particularly in the northern regions, from Tuesday, October 7, and that the high risk will persist through the weekend. It is important to note that while the cumulative number of fire incidents this year is about 75% lower compared to the same period last year, the current "environmental conditions" are at their worst. Large-scale fires have occurred in the western areas of Martinópolis and Araçatuba. Social media is filled with posts reporting smoke and poor visibility around Ribeirão Preto, and disaster prevention authorities are urging the public via Instagram and SMS to strictly adhere to fire bans and reporting protocols. Residents are advised to manage fire sources outdoors, strictly prohibit field and waste burning, stay hydrated, and protect vulnerable groups.