200
WWUS73 KLOT 220159
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
859 PM CDT SAT JUN 21 2025
ILZ103>105-221200-
/O.CON.KLOT.XH.W.0001.000000T0000Z-250624T0500Z/
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-
INCLUDING THE CITIES OF NORTHBROOK, OAK PARK, EVANSTON, PARK
FOREST, SCHAUMBURG, CHICAGO, LA GRANGE, LEMONT, OAK LAWN, CALUMET
CITY, ORLAND PARK, OAK FOREST, CICERO, DES PLAINES, AND PALATINE
859 PM CDT SAT JUN 21 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT MONDAY
NIGHT...
* WHAT...DANGEROUSLY HOT AND HUMID CONDITIONS WITH HIGH TEMPERATURES
EACH DAY WELL INTO THE 90S AND PEAK AFTERNOON HEAT INDEX VALUES
BETWEEN 100 AND 107 DEGREES EXPECTED.
* WHERE...CENTRAL COOK, NORTHERN COOK, AND SOUTHERN COOK COUNTIES.
* WHEN...UNTIL MIDNIGHT CDT MONDAY NIGHT.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. 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.
* ADDITIONAL DETAILS...HEAT INDICES WILL LIKELY REMAIN IN THE 90S
LATE INTO THE EVENING HOURS WITH OVERNIGHT LOWS POSSIBLY
STRUGGLING TO FALL MUCH BELOW 80 DEGREES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-221200-
/O.CON.KLOT.HT.Y.0001.000000T0000Z-250624T0500Z/
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 PAXTON, GARY, GILMAN, MINOOKA,
BOURBONNAIS, BUFFALO GROVE, WHEATON, VALPARAISO, BYRON, LOMBARD,
CAROL STREAM, PONTIAC, MANHATTAN, ROCHELLE, COAL CITY, WATSEKA,
MOKENA, RENSSELAER, MERRILLVILLE, ELGIN, DEKALB, WOODSTOCK,
PEOTONE, MORRIS, ROCKFORD, DIXON, GIBSON CITY, BOLINGBROOK,
JOLIET, MUNDELEIN, KANKAKEE, BRADLEY, SYCAMORE, AURORA, WAUKEGAN,
CRYSTAL LAKE, GURNEE, ALGONQUIN, CRETE, LA SALLE, BELVIDERE,
MCHENRY, ROSELAWN, DOWNERS GROVE, MARSEILLES, DWIGHT, HAMMOND,
BEECHER, CHESTERTON, STREATOR, PORTAGE, OSWEGO, CHANNAHON,
NAPERVILLE, FAIRBURY, OXFORD, OTTAWA, YORKVILLE, DEMOTTE,
MENDOTA, KENTLAND, FOWLER, PLANO, MOROCCO, PLAINFIELD,
WILMINGTON, AND OREGON
859 PM CDT SAT JUN 21 2025 /959 PM EDT SAT JUN 21 2025/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CDT /1 AM EDT/
MONDAY NIGHT...
* WHAT...PEAK AFTERNOON HEAT INDEX VALUES AROUND 105 DEGREES
EXPECTED.
* WHERE...PORTIONS OF CENTRAL, EAST CENTRAL, NORTH CENTRAL, AND
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
* WHEN...UNTIL MIDNIGHT CDT /1 AM EDT/ MONDAY NIGHT.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
* ADDITIONAL DETAILS...HEAT IMPACTS WILL BE WORSENED BY CONSECUTIVE
DAYS OF HOT AND HUMID CONDITIONS, WITH OVERNIGHT LOWS IN THE MID
70S PROVIDING LIMITED RELIEF.
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.
MONITOR THE LATEST FORECASTS AND WARNINGS FOR UPDATES.
CARLAW
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