Illinois, Indiana Moderate Heat Advisory | Effective 08/31/2026 23:48

Headline: 
Heat Advisory issued September 1 at 1:48AM CDT until September 1 at 9:00PM CDT by NWS Chicago IL
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
August 31, 2026 - 11:48pm
Expires: 
September 1, 2026 - 10:00am
Description: 
* WHAT...Heat index values of 100 to 110 expected. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the first Heat Advisory, from noon CDT /1 PM EDT/ today to 9 PM CDT /10 PM EDT/ this evening. For the second Heat Advisory, from noon CDT /1 PM EDT/ to 9 PM CDT /10 PM EDT/ Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Consider altering outdoor plans.
Area Description: 
La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Southern Cook; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper; Benton
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov