Low humidity alerts spark health warnings and fire risk across Brazil

Across multiple states in Brazil, a dry air mass has driven relative humidity levels down to 20‑30%, prompting yellow alerts from the National Institute of Meteorology (Inmet) and local Defesa Civil agencies. The conditions are accompanied by daytime temperatures ranging from the mid‑20s to above 35 °C in regions such as São Paulo, Mato Grosso and Minas Gerais.

Health officials warn that the low moisture intensifies skin dryness, eye and respiratory irritation, and raises the risk of asthma, bronchitis and other chronic conditions. Their recommendations include drinking plenty of water, avoiding strenuous outdoor activity during the hottest hours, using humidifiers, applying skin moisturisers and sunscreen, and keeping environments ventilated.

The dry climate also heightens the danger of wildfires. Municipal defence civil departments have urged residents to refrain from open flames, burning waste, discarding cigarette butts in vegetation, and to report any signs of fire immediately. These precautions aim to protect public health and prevent damage to property and natural ecosystems.