607 WWUS73 KLOT 281618 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1118 AM CDT Sun Jun 28 2026 ILZ103>105-290230- /O.UPG.KLOT.XH.A.0001.260629T1700Z-260702T0300Z/ /O.NEW.KLOT.XH.W.0001.260629T1700Z-260702T0300Z/ Northern Cook-Central 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 1118 AM CDT Sun Jun 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON MONDAY TO 10 PM CDT WEDNESDAY... * 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. 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. && $$ ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-010-011-019-290230- /O.CON.KLOT.HT.Y.0001.260629T1700Z-260702T0300Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper- Benton- Including the cities of Downers Grove, Paxton, Portage, Carol Stream, Waukegan, Oxford, Merrillville, Bolingbrook, Naperville, Dixon, Joliet, Marseilles, Dwight, Sycamore, Chesterton, Peotone, Fairbury, Rochelle, Morris, Coal City, Plainfield, Plano, Hammond, Belvidere, Crete, Rockford, Mundelein, McHenry, Yorkville, Manhattan, Bradley, Morocco, Kankakee, Oswego, Fowler, Gilman, Gary, Crystal Lake, Bourbonnais, Aurora, Mendota, Mokena, Beecher, Valparaiso, Wheaton, Oregon, Woodstock, Gurnee, Gibson City, Wilmington, Buffalo Grove, Minooka, DeKalb, Pontiac, Rensselaer, Byron, Lombard, Ottawa, Elgin, Watseka, Kentland, Channahon, Roselawn, La Salle, DeMotte, Streator, and Algonquin 1118 AM CDT Sun Jun 28 2026 /1218 PM EDT Sun Jun 28 2026/ ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/ MONDAY TO 10 PM CDT /11 PM EDT/ WEDNESDAY... * WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/ Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. && $$ DK