THE ATMOSPHERE TODAY · EVENT← TODAY'S COVERheat
RIO DE JANEIRO — A RED ALERT FOR EXTREME HEAT THROUGH WEDNESDAY
On the board · September 28, 2026 →THE DOME
A red alert for extreme heat covers Rio de Janeiro and nine other cities until Wednesday evening, while humidity near 20 percent raises fire risk around Brasília.
WHO IT TOUCHES
Health systemsFlood-affected communities in Thailand, Chile, India and Nepal, and extreme heat in Rio de Janeiro.