Weather Alerts For Chicago, IL

# HEADLINE -------------------- EXTREME HEAT WARNING IN EFFECT FROM NOON MONDAY TO 10 PM CDT WEDNESDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values around 105 expected each afternoon. WHERE Cook County. WHEN From Monday afternoon through Wednesday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Sunday, June 28, 2026 at 11:18 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 Calumet City, Evanston, Cicero, Schaumburg, Chicago, La Grange, Oak Forest, Park Forest, Lemont, Palatine, Oak Lawn, Des Plaines, Oak Park, Orland Park, and Northbrook