837
WWUS73 KLOT 291509
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
1009 AM CDT MON JUN 29 2026
ILZ103>105-300115-
/O.CON.KLOT.XH.W.0001.260629T1700Z-260702T0300Z/
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-
INCLUDING THE CITIES OF PARK FOREST, OAK LAWN, SCHAUMBURG, OAK
FOREST, CALUMET CITY, PALATINE, CHICAGO, CICERO, LA GRANGE, OAK
PARK, LEMONT, ORLAND PARK, EVANSTON, NORTHBROOK, AND DES PLAINES
1009 AM CDT MON JUN 29 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 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...UNTIL 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-
010-011-019-300115-
/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 OSWEGO, ELGIN, RENSSELAER, YORKVILLE,
CRETE, MOROCCO, WAUKEGAN, MARSEILLES, COAL CITY, ALGONQUIN,
DOWNERS GROVE, WILMINGTON, MERRILLVILLE, OXFORD, GARY, LA SALLE,
GILMAN, PAXTON, PONTIAC, BUFFALO GROVE, ROSELAWN, DEMOTTE,
BOLINGBROOK, DIXON, FOWLER, AURORA, HAMMOND, CAROL STREAM,
WOODSTOCK, CRYSTAL LAKE, MOKENA, BEECHER, WHEATON, GURNEE,
KENTLAND, MORRIS, BOURBONNAIS, JOLIET, PORTAGE, BYRON, LOMBARD,
ROCKFORD, WATSEKA, MANHATTAN, OREGON, STREATOR, VALPARAISO,
OTTAWA, PLAINFIELD, PEOTONE, GIBSON CITY, ROCHELLE, FAIRBURY,
NAPERVILLE, PLANO, MENDOTA, KANKAKEE, DWIGHT, MUNDELEIN, MCHENRY,
BELVIDERE, BRADLEY, CHANNAHON, DEKALB, CHESTERTON, MINOOKA, AND
SYCAMORE
1009 AM CDT MON JUN 29 2026 /1109 AM EDT MON JUN 29 2026/
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT 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...UNTIL 10 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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
IZZI
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