MIAMI, FL — The National Weather Service in Miami has issued a forecast of heat index values that will reach the low to mid 90s and drier conditions that will make the above-average temperatures feel even hotter this afternoon, Thursday, May 14, 2026.
Rainfall chances today are generally low to moderate, with Fort Lauderdale at 32%, Miami at 22%, West Palm Beach at 14%, Homestead at 17%, Flamingo at 16%, and Immokalee at 11%, according to the NWS.
A marginal risk of severe thunderstorms exists across portions of South Florida.
National Weather Service Miami South Florida Doppler Radar
Heat Exhaustion versus Heat Stroke
Take action when you see symptoms of heat exhaustion and heat stroke.To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments.
What is the Urban Heat Island Effect?
The urban heat island effect occurs when urban areas become much warmer—sometimes by as much as 20°F—than nearby rural landscapes, especially during summer.
According to NASA, this happens because cities have more heat-absorbing surfaces like asphalt, concrete, and buildings, and less vegetation to provide cooling through shade and evapotranspiration.