587 WWUS73 KLOT 271433 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 933 AM CDT Mon Jul 27 2026 ILZ004-005-012-020-023-033-106>108-280045- /O.UPG.KLOT.HT.Y.0004.000000T0000Z-260728T0200Z/ /O.EXA.KLOT.XH.W.0002.000000T0000Z-260728T0200Z/ Boone-McHenry-Kane-Kendall-Kankakee-Iroquois-Northern Will- Southern Will-Eastern Will- Including the cities of Peotone, Watseka, McHenry, Bourbonnais, Manhattan, Aurora, Oswego, Elgin, Wilmington, Woodstock, Kankakee, Bradley, Beecher, Crystal Lake, Crete, Belvidere, Yorkville, Plainfield, Plano, Gilman, Channahon, Bolingbrook, Mokena, Algonquin, and Joliet 933 AM CDT Mon Jul 27 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with peak heat index values 110 to locally over 115 degrees expected. * WHERE...Iroquois, Boone, Eastern Will, Kane, Kankakee, Kendall, McHenry, Northern Will, and Southern Will Counties. * WHEN...Until 9 PM CDT this 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. && $$ ILZ003-008-010-011-019-021-032-039-280045- /O.CON.KLOT.XH.W.0002.000000T0000Z-260728T0200Z/ Winnebago-Ogle-Lee-De Kalb-La Salle-Grundy-Livingston-Ford- Including the cities of Coal City, Dixon, Rochelle, DeKalb, Morris, Rockford, Mendota, Paxton, Minooka, Gibson City, Streator, Marseilles, Ottawa, La Salle, Pontiac, Fairbury, Byron, Dwight, Oregon, and Sycamore 933 AM CDT Mon Jul 27 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with peak heat index values 110 to locally over 115 degrees expected. * WHERE...Livingston, Ford, De Kalb, La Salle, Lee, Ogle, Winnebago, and Grundy Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ INZ002-280045- /O.EXA.KLOT.HT.Y.0004.000000T0000Z-260728T0200Z/ Porter- Including the cities of Chesterton, Valparaiso, and Portage 933 AM CDT Mon Jul 27 2026 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values in excess of 105 expected. * WHERE...Porter County. * WHEN...Until 9 PM CDT this evening. * 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. && $$ ILZ006-013-103>105-INZ001-010-011-019-280045- /O.CON.KLOT.HT.Y.0004.000000T0000Z-260728T0200Z/ Lake IL-DuPage-Northern Cook-Central Cook-Southern Cook-Lake IN- Newton-Jasper-Benton- Including the cities of Kentland, Des Plaines, Cicero, Gary, Palatine, Hammond, Chicago, Oak Park, Oak Lawn, Fowler, DeMotte, Lombard, Lemont, Naperville, Oak Forest, Morocco, Orland Park, La Grange, Northbrook, Calumet City, Park Forest, Roselawn, Evanston, Downers Grove, Merrillville, Carol Stream, Mundelein, Waukegan, Buffalo Grove, Wheaton, Oxford, Gurnee, Rensselaer, and Schaumburg 933 AM CDT Mon Jul 27 2026 /1033 AM EDT Mon Jul 27 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT /10 PM EDT/ THIS EVENING... * WHAT...Heat index values in excess of 105 expected. * WHERE...In Illinois, Central Cook, DuPage, Lake IL, Northern Cook, and Southern Cook Counties. In Indiana, Benton, Jasper, Lake IN, and Newton Counties. * WHEN...Until 9 PM CDT /10 PM EDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ Doom