…EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING…
Issued: 423 PM CDT Mon Jul 27 2026
WHAT
A dangerous combination of oppressively humid and hot conditions with heat index values between 105 to 115 expected into the evening.
WHERE
Portions of north central, northwest, and west central Illinois, east central, northeast, and southeast Iowa, and northeast Missouri.
WHEN
Until 10 PM CDT this evening.
IMPACTS
Heat related illnesses increase significantly during extreme heat and high humidity events.
PRECAUTIONARY/PREPAREDNESS ACTIONS
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.
