Moderate Expected Likely Heat Advisory Heat Advisory issued September 1 at 2:48AM CDT until September 3 at 7:00PM CDT by NWS Lincoln IL Sep 1, 2:48 AM → Sep 3, 7:00 PM WHAT: Afternoon Heat index values up to 105, only falling into themid to upper 70s at night. WHERE: Portions of central, east central, southeast, and westcentral Illinois. WHEN: Until 7 PM CDT Thursday. IMPACTS: Hot temperatures and high humidity may cause heatillnesses. + Read More Take extra precautions when outside. 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. Updated: Sep 1, 9:58 AM Source: NWS Alert