805
WWUS73 KLOT 010730
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
230 AM CDT WED JUL 1 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-011730-
/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, AURORA, ROCKFORD, NAPERVILLE,
OREGON, PORTAGE, MCHENRY, CHANNAHON, BYRON, PEOTONE, WAUKEGAN,
FOWLER, MINOOKA, BELVIDERE, BOURBONNAIS, COAL CITY, DEKALB,
MARSEILLES, OXFORD, PONTIAC, OTTAWA, WOODSTOCK, YORKVILLE,
STREATOR, WILMINGTON, CAROL STREAM, CRETE, DEMOTTE, BOLINGBROOK,
MENDOTA, MUNDELEIN, ALGONQUIN, KANKAKEE, JOLIET, DIXON, WATSEKA,
HAMMOND, MERRILLVILLE, BRADLEY, ELGIN, SYCAMORE, BEECHER, MORRIS,
GIBSON CITY, MOKENA, PLAINFIELD, LA SALLE, ROSELAWN, GURNEE,
PLANO, CHESTERTON, GARY, KENTLAND, DWIGHT, VALPARAISO, ROCHELLE,
MANHATTAN, OSWEGO, FAIRBURY, GILMAN, WHEATON, PAXTON, MOROCCO,
BUFFALO GROVE, RENSSELAER, CRYSTAL LAKE, AND DOWNERS GROVE
230 AM CDT WED JUL 1 2026 /330 AM EDT 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 110 DEGREES.
* WHERE...NORTHERN AND CENTRAL ILLINOIS AND NORTHWEST INDIANA.
* WHEN...UNTIL MIDNIGHT CDT THURSDAY NIGHT.
* 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.
ILZ103>105-011730-
/O.CON.KLOT.XH.W.0001.000000T0000Z-260703T0500Z/
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-
INCLUDING THE CITIES OF NORTHBROOK, OAK LAWN, CALUMET CITY,
PALATINE, SCHAUMBURG, PARK FOREST, LEMONT, LA GRANGE, OAK PARK,
OAK FOREST, CICERO, EVANSTON, CHICAGO, DES PLAINES, AND ORLAND
PARK
230 AM 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 102 TO 107 DEGREES.
* WHERE...COOK COUNTY.
* WHEN...UNTIL MIDNIGHT CDT THURSDAY NIGHT.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS.
* ADDITIONAL DETAILS...STIFLING HEAT WILL CONTINUE EVEN AT NIGHT
WITH HEAT INDICES REMAINING ABOVE 90 DEGREES UNTIL MIDNIGHT OR
JUST AFTER.
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.
- IZZI
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page