Active AlertsMattoon / Charleston, IL

What: Dangerously hot conditions with heat index values up to around 105. Expect minimal relief overnight with lows in the mid 70s.
Where: Portions of central, east central, southeast, and west central Illinois.
When: Until 7 PM CDT Friday.
Impacts: Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.