NWS Lincoln ILXH.W 0003September 4, 2026
Extreme Heat Warning: Knox, Stark, Peoria and 17 more, IL
The National Weather Service office in Lincoln issued an extreme heat warning for Knox, Stark, Peoria and 17 more in Illinois, which was in force until 7:00 p.m. local time on September 4. It was the 3rd extreme heat warning the NWS office in Lincoln issued in 2026. Illinois had 5 extreme heat warnings in September 2026, against 0 in an average September of 2008-2025 (Illinois's extreme heat warnings by year).
ExpiredWarning
In force for 17.5 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Lincoln IL
- Area
- Knox, Stark, Peoria and 17 more
- State
- Illinois
- Level
- Warning
- Issued
- 1:32 a.m. CDT, September 4, 2026
- Expires
- 7:00 p.m. CDT, September 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KILX XH.W 0003
- Official source
- National Weather Service: the notice at its source
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 up to 105. * WHERE...Portions of central, east central, and west central Illinois. * WHEN...Until 7 PM CDT this 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. 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.
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.