Severe · Extreme Heat WarningActive alert
Extreme Heat Warning issued September 4 at 1:03PM CDT until September 5
Affecting Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion; Macon; Moultrie; Douglas; Coles; Edgar; Clark
In effect until: Sep 5, 2026, 10:00 AM
Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion; Macon; Moultrie; Douglas; Coles; Edgar; Clark
Likely impact; effects through 10:00 AM.
Stay in air conditioning if possible. Drink water regularly and check on elderly neighbors.
Read the original bulletin (official text)
* WHAT...Dangerously hot conditions with heat index values up to around 105 each afternoon. Expect minimal relief overnight with low temperatures in the mid 70s. * WHERE...Portions of central, east central, and west central Illinois. * WHEN...Until 7 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™