Active Weather Alerts
Extreme Heat Warning
Issued: 6:08 AM Sep. 3, 2026 – National Weather Service
...EXTREME HEAT WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values of 100 to 105 expected. This is the third day in a row with a forecast or observed maximum heat index over 100 degrees. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...The threat for heat related illnesses increases significantly during prolonged periods of hot temperatures and high humidity levels. * ADDITIONAL DETAILS...A cold front possibly accompanied by thunderstorms will move inland from Lake Michigan this afternoon and evening leading to rapidly improving conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The prolonged magnitude of observed and anticipated heat will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. Residents of the city of Chicago can call 3 1 1 to request well being checks for elderly friends or family members, or for information on finding the nearest cooling center. Consider altering outdoor plans. If you must spend an extended time outdoors, wear lightweight and loose fitting clothing. Take action when you see symptoms of heat exhaustion and heat stroke. &&
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