NWS Chicago ILXH.W 0001June 28, 2026
Extreme Heat Warning: Northern Cook, Central Cook and Southern Cook, IL
The National Weather Service office in Chicago issued an extreme heat warning for Northern Cook, Central Cook and Southern Cook in Illinois, which was in force until 10:00 p.m. local time on July 1. It was the 1st extreme heat warning the NWS office in Chicago issued in 2026. Illinois had 5 extreme heat warnings in June 2026, against 1 in an average June of 2008-2025 (Illinois's extreme heat warnings by year).
ExpiredWarning
In force for 2 days; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Chicago IL
- Area
- Northern Cook, Central Cook and Southern Cook
- State
- Illinois
- Level
- Warning
- Issued
- 11:18 a.m. CDT, June 28, 2026
- In force from
- 12:00 p.m. CDT, June 29, 2026
- Expires
- 10:00 p.m. CDT, July 1, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KLOT XH.W 0001
- Official source
- National Weather Service: the notice at its source
Extreme Heat Warnings in Illinois since 2008Every warning type in Illinois
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
* WHAT...Dangerously hot conditions with heat index values around 105 expected each afternoon. * WHERE...Cook County. * WHEN...From Monday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
What the agency told people to do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. The magnitude of anticipated heat, combined with oppressive warmth at night 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.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.