Extreme Heat Watch
Status
Event Continued Active alertStart Time
Wed 07/23/2025 11:00 AM EDTEnd Time
Thu 07/24/2025 11:00 PM EDTSignificance
WatchImpacts
Moderate impact
Full Alert Message
URGENT - WEATHER MESSAGE National Weather Service Chicago IL 819 PM CDT Mon Jul 21 2025 ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 115 possible. * WHERE...Portions of central, east central, north central, and northeast Illinois. * WHEN...From Wednesday morning through Thursday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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.
Technical Header
ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-221130- /O.CON.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern Will-Southern Will-Eastern Will- Including the cities of Dwight, Ottawa, Waukegan, Plainfield, Oswego, Belvidere, Minooka, Beecher, Fairbury, Yorkville, Joliet, Aurora, Peotone, Rockford, Crystal Lake, Wilmington, Streator, Sycamore, Bourbonnais, Channahon, Mendota, Oregon, Dixon, Rochelle, Downers Grove, Woodstock, Paxton, Bolingbrook, Bradley, Gurnee, Byron, Lombard, Mokena, Kankakee, Morris, Watseka, Manhattan, Mundelein, Algonquin, Elgin, Gilman, Carol Stream, Marseilles, Naperville, Pontiac, Coal City, Buffalo Grove, DeKalb, Wheaton, Gibson City, La Salle, McHenry, Crete, and Plano 819 PM CDT Mon Jul 21 2025
