Heat Advisory

Status

Event Extended (Area) Active alert

Start Time

Wed 09/02/2026 01:00 PM EDT

End Time

Wed 09/02/2026 10:00 PM EDT

Significance

Advisory

Impacts

Low impact

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1255 AM CDT Wed Sep 2 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Central Cook, DuPage, Kane, Lake IL, McHenry, and Northern Cook Counties. * WHEN...From noon today to 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take extra precautions when outside or consider altering outdoor plans. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Technical Header

ILZ003>006-008-010>013-103-104-021600- /O.EXA.KLOT.HT.Y.0006.260902T1700Z-260903T0200Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- Northern Cook-Central Cook- Including the cities of Palatine, Oak Park, Elgin, Buffalo Grove, Wheaton, Aurora, DeKalb, Naperville, Rockford, Rochelle, Woodstock, Oak Lawn, Cicero, Schaumburg, Northbrook, Belvidere, McHenry, Algonquin, Downers Grove, Waukegan, Lombard, La Grange, Byron, Dixon, Carol Stream, Sycamore, Des Plaines, Chicago, Mundelein, Crystal Lake, Oregon, Gurnee, and Evanston 1255 AM CDT Wed Sep 2 2026