739 

WWUS73 KLOT 290211

NPWLOT



URGENT - WEATHER MESSAGE

National Weather Service Chicago IL

911 PM CDT Sun Jun 28 2026



ILZ103>105-291215-

/O.CON.KLOT.XH.W.0001.260629T1700Z-260702T0300Z/

Northern Cook-Central Cook-Southern Cook-

Including the cities of Orland Park, Cicero, Des Plaines,

Palatine, Oak Lawn, Schaumburg, Oak Park, La Grange, Oak Forest,

Lemont, Chicago, Calumet City, Park Forest, Northbrook, and

Evanston

911 PM CDT Sun Jun 28 2026



...EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON MONDAY TO 10 PM 

CDT WEDNESDAY...



* WHAT...Dangerously hot conditions with heat index values around 

  105 expected each afternoon.



* WHERE...Central Cook, Northern Cook, and Southern Cook Counties.



* WHEN...From noon Monday to 10 PM CDT Wednesday.



* 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.



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.



&&



$$



ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-

010-011-019-291215-

/O.CON.KLOT.HT.Y.0001.260629T1700Z-260702T0300Z/

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La

Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern

Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-

Benton-

Including the cities of Rochelle, Rockford, Mendota,

Merrillville, Portage, Algonquin, Belvidere, DeKalb, Carol

Stream, Bourbonnais, Buffalo Grove, Kankakee, Bradley, Peotone,

Roselawn, Crete, Wilmington, Dwight, Kentland, Lombard, Fairbury,

Yorkville, Beecher, Dixon, Oxford, Marseilles, Elgin, Gary,

Morris, Ottawa, Chesterton, Bolingbrook, Aurora, Coal City,

Minooka, Mundelein, Morocco, Valparaiso, Manhattan, Woodstock,

Watseka, Mokena, Gurnee, Plainfield, Oregon, Hammond, Plano,

Pontiac, Gilman, Downers Grove, Streator, Joliet, Paxton,

Channahon, Waukegan, Rensselaer, Naperville, McHenry, La Salle,

Sycamore, Gibson City, Byron, Fowler, Wheaton, Crystal Lake,

DeMotte, and Oswego

911 PM CDT Sun Jun 28 2026 /1011 PM EDT Sun Jun 28 2026/



...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/ MONDAY 

TO 10 PM CDT /11 PM EDT/ WEDNESDAY...



* WHAT...Heat index values around 105 expected each afternoon



* WHERE...Portions of central, east central, north central, and 

  northeast Illinois and northwest Indiana.



* WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/ 

  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.



Do not leave young children and pets in unattended vehicles. Car 

interiors will reach lethal temperatures in a matter of minutes.



&&



$$



Yack