Extreme Heat Warning Issued for Cook County Until 7 PM CDT
The National Weather Service has upgraded the heat advisory to an Extreme Heat Warning for Cook County, effective until 7 PM CDT this evening.
3 reports on this incident · first at Sep 3, 2026, 2:15 a.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
We last searched for new coverage of this at Sep 3, 2026, 2:37 a.m. ET — checked 57 min ago.
Earlier reports
Sep 3, 2026, 2:20 a.m. ET
Heat-Related Illness Risk Rises as Extreme Heat Warning Continues in Cook County
The National Weather Service Chicago IL warns that the threat for heat-related illnesses increases significantly during prolonged periods of hot temperatures and high humidity levels. The warning, issued at 1:08 a.m. CDT on September 3, 2026, remains in effect until 7 p.m. CDT this evening for Central Cook, Northern Cook, and Southern Cook Counties.
Dangerously hot conditions with heat index values of 100 to 105 are expected, marking the third consecutive day with a forecast or observed maximum heat index over 100 degrees. The prolonged magnitude of heat will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions, according to the Weather Service.
Residents 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. Officials advise altering outdoor plans and wearing lightweight, loose-fitting clothing if extended time outdoors is unavoidable, and taking action when symptoms of heat exhaustion or heat stroke appear.
Sep 3, 2026, 2:15 a.m. ETFirst report
Extreme Heat Warning in Effect for Cook County Until 7 PM CDT
The National Weather Service Chicago IL has issued an Extreme Heat Warning for Central, Northern, and Southern Cook Counties, in effect until 7 PM CDT on September 3, 2026. The warning began at 1:08 AM CDT and expires at 7:00 PM CDT the same day.
The warning cites dangerously hot conditions with heat index values of 100 to 105 degrees, marking the third consecutive day with a forecast or observed maximum heat index over 100 degrees. The prolonged heat increases the risk of heat-related illnesses, particularly for the elderly and those with pre-existing health conditions.
Residents of Chicago can call 3 1 1 to request well-being checks for elderly friends or family members or to find the nearest cooling center. Officials advise altering outdoor plans, wearing lightweight and loose-fitting clothing if outdoors, and taking action when seeing symptoms of heat exhaustion or heat stroke.
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- Version 13 Sept 2026, 06:20current
First published.
- Version 13 Sept 2026, 06:15current
First published.
- Version 13 Sept 2026, 06:22current
First published.
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