08/31/2026
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1224 PM CDT Mon Aug 31 2026
ILZ019>021-023-032-033-039-105>108-INZ001-002-010-011-019-010330-
/O.NEW.KLOT.HT.Y.0005.260901T1700Z-260902T0200Z/
/O.NEW.KLOT.HT.Y.0006.260902T1700Z-260903T0200Z/
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN-
Porter-Newton-Jasper-Benton-
Including the cities of Pontiac, Gibson City, Bolingbrook, Fowler,
Mendota, Oswego, Bourbonnais, Ottawa, Plano, Crete, Peotone, Hammond,
Kankakee, Fairbury, Chesterton, Joliet, Oxford, Streator, DeMotte,
Mokena, Oak Forest, Rensselaer, Orland Park, Marseilles, Gilman, La
Salle, Lemont, Wilmington, Roselawn, Morris, Beecher, Portage, Park
Forest, Morocco, Yorkville, Minooka, Dwight, Valparaiso, Channahon,
Paxton, Bradley, Manhattan, Gary, Merrillville, Coal City,
Plainfield, Watseka, Calumet City, and Kentland
1224 PM CDT Mon Aug 31 2026 /124 PM EDT Mon Aug 31 2026/
..HEAT ADVISORY IN EFFECT FROM NOON CDT TO 9 PM CDT TUESDAY.....HEAT ADVISORY IN EFFECT FROM NOON CDT TO 9 PM CDT WEDNESDAY...
* WHAT...Peak heat indices of 100 to 105 degrees expected Tuesday and
Wednesday afternoons.
* WHERE...Portions of northern and central Illinois near and south of
I-80, as well as all of northwest Indiana.
* WHEN...For the first Heat Advisory, from noon CDT to 9 PM CDT
Tuesday. For the second Heat Advisory, from noon CDT to 9 PM CDT
Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
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.
