Weather Alerts For Wilmette, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY NIGHT # DETAILS -------------------- WHAT Dangerously hot conditions with peak afternoon heat index values of 100 to 105 degrees expected. WHERE Central Cook, Northern Cook, and Southern Cook Counties. WHEN Until midnight CDT Thursday Night. IMPACTS Heat related illnesses increase during heat waves. ISSUED AT Wednesday, July 1, 2026 at 3:09 PM 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. # AREAS AFFECTED -------------------- Central Cook, Northern Cook, Southern Cook Including the cities of Orland Park, Park Forest, Chicago, Palatine, Lemont, La Grange, Calumet City, Northbrook, Schaumburg, Oak Lawn, Des Plaines, Evanston, Oak Park, Oak Forest, and Cicero