863
WWUS73 KLOT 012009
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
309 PM CDT WED JUL 1 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-020615-
/O.CON.KLOT.XH.W.0001.000000T0000Z-260703T0500Z/
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 LOMBARD, VALPARAISO, OSWEGO, MOKENA,
KENTLAND, MORRIS, OTTAWA, DEMOTTE, MOROCCO, OREGON, RENSSELAER,
BELVIDERE, PEOTONE, YORKVILLE, DOWNERS GROVE, BYRON, WOODSTOCK,
OXFORD, KANKAKEE, WHEATON, MANHATTAN, MARSEILLES, CRYSTAL LAKE,
LA SALLE, GILMAN, JOLIET, FOWLER, WAUKEGAN, WILMINGTON, WATSEKA,
ROSELAWN, HAMMOND, DEKALB, PLAINFIELD, MERRILLVILLE, ELGIN,
ROCKFORD, PLANO, FAIRBURY, CHESTERTON, MCHENRY, GURNEE, GARY,
NAPERVILLE, CAROL STREAM, MINOOKA, PONTIAC, BOLINGBROOK, GIBSON
CITY, ALGONQUIN, AURORA, MUNDELEIN, CRETE, CHANNAHON, STREATOR,
DIXON, PAXTON, BEECHER, BRADLEY, BUFFALO GROVE, MENDOTA,
SYCAMORE, BOURBONNAIS, COAL CITY, DWIGHT, PORTAGE, AND ROCHELLE
309 PM CDT WED JUL 1 2026 /409 PM EDT WED JUL 1 2026/
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT /1 AM
EDT/ THURSDAY NIGHT...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH PEAK AFTERNOON HEAT INDEX
VALUES OF 100 TO 105 DEGREES EXPECTED.
* WHERE...PORTIONS OF CENTRAL, EAST CENTRAL, NORTH CENTRAL, AND
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
* WHEN...UNTIL MIDNIGHT CDT /1 AM EDT/ THURSDAY NIGHT.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE DURING HEAT WAVES.
* ADDITIONAL DETAILS...DANGEROUS HEAT IS EXPECTED TO PERSIST THROUGH
THURSDAY. THUNDERSTORMS MAY BEGIN TO BRING SOME RELIEF FROM THE
HEAT FOR PORTIONS OF NORTHERN ILLINOIS BY THURSDAY AFTERNOON OR
EVENING.
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.
ILZ103>105-020615-
/O.CON.KLOT.XH.W.0001.000000T0000Z-260703T0500Z/
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-
INCLUDING THE CITIES OF ORLAND PARK, PARK FOREST, CHICAGO,
PALATINE, LEMONT, LA GRANGE, CALUMET CITY, NORTHBROOK,
SCHAUMBURG, OAK LAWN, DES PLAINES, EVANSTON, OAK PARK, OAK
FOREST, AND CICERO
309 PM CDT WED JUL 1 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
THURSDAY NIGHT...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH PEAK AFTERNOON HEAT INDEX
VALUES OF 100 TO 105 DEGREES EXPECTED.
* WHERE...CENTRAL COOK, NORTHERN COOK, AND SOUTHERN COOK COUNTIES.
* WHEN...UNTIL MIDNIGHT CDT THURSDAY NIGHT.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE DURING HEAT WAVES.
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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
BORCHARDT
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