Weather Alerts For Oak Park, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT WEDNESDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values around 105 expected each afternoon. WHERE Central Cook, Northern Cook, and Southern Cook Counties. WHEN Until 10 PM CDT Wednesday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Monday, June 29, 2026 at 10:09 AM CDT ISSUED BY National Weather Service Chicago IL HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. The magnitude of anticipated heat, combined with oppressive warmth at night will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. Residents of the city of Chicago can call 3 1 1 to request well being checks for elderly friends or family members, or for information on finding the nearest cooling center. # AREAS AFFECTED -------------------- Central Cook, Northern Cook, Southern Cook Including the cities of Park Forest, Oak Lawn, Schaumburg, Oak Forest, Calumet City, Palatine, Chicago, Cicero, La Grange, Oak Park, Lemont, Orland Park, Evanston, Northbrook, and Des Plaines