Active Weather Alerts
Heat Advisory
Issued: 6:08 AM Sep. 3, 2026 – National Weather Service
...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected. This is the third day in a row with forecast or observed heat indices above 100 degrees. * WHERE...Boone, DuPage, Kane, and McHenry Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses especially after several days of dangerous heat. * ADDITIONAL DETAILS...A cold front possibly accompanied by thunderstorms will move inland from Lake Michigan this evening leading to rapidly improving conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Consider altering outdoor plans. If outdoors for prolonged periods of time, wear lightweight and loose fitting clothing. Take action when you see symptoms of heat exhaustion and heat stroke. &&
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