Heat Advisory
Status
Event Continued Active alertStart Time
Mon 06/29/2026 01:00 PM EDTEnd Time
Wed 07/01/2026 11:00 PM EDTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Naperville, IL ∙ Joliet, IL ∙ Rockford, IL ∙ Aurora, IL ∙ Elgin, IL ∙ Waukegan, IL ∙ Bolingbrook, IL ∙ Hammond, IN ∙ Gary, IN ∙ Wheaton, ILFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Chicago IL 202 AM CDT Mon Jun 29 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/ TODAY 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/ today 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.
Technical Header
ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002- 010-011-019-291715- /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 Watseka, Joliet, Portage, Oregon, Sycamore, Kentland, Fowler, Rochelle, Bradley, Channahon, DeKalb, Bourbonnais, Fairbury, Bolingbrook, Crete, Gurnee, Peotone, Valparaiso, Ottawa, Naperville, Streator, Woodstock, Plainfield, Wilmington, Oswego, Pontiac, Gibson City, Roselawn, Crystal Lake, Mundelein, Dixon, Wheaton, Gary, Hammond, Morocco, La Salle, Morris, Plano, Aurora, Chesterton, Manhattan, DeMotte, Carol Stream, Merrillville, Downers Grove, McHenry, Belvidere, Coal City, Paxton, Oxford, Rensselaer, Elgin, Waukegan, Lombard, Yorkville, Algonquin, Minooka, Mokena, Marseilles, Gilman, Beecher, Mendota, Buffalo Grove, Dwight, Kankakee, Byron, and Rockford 202 AM CDT Mon Jun 29 2026 /302 AM EDT Mon Jun 29 2026/
