Weather Alerts For Northfield, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY NIGHT # 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 midnight CDT Thursday Night. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ADDITIONAL DETAILS Dangerous heat is now expected to persist through Thursday. Thunderstorms may begin to bring some relief from the heat by Thursday afternoon or evening. ISSUED AT Tuesday, June 30, 2026 at 9:06 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. 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 Cicero, Palatine, Oak Lawn, Orland Park, Evanston, La Grange, Chicago, Lemont, Calumet City, Oak Forest, Oak Park, Des Plaines, Schaumburg, Park Forest, and Northbrook