699
WWUS73 KLSX 271714
NPWLSX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
1214 PM CDT MON JUL 27 2026
ILZ074-079-101-102-MOZ065-072>075-084-085-099-281115-
/O.EXT.KLSX.XH.W.0002.000000T0000Z-260729T0000Z/
WASHINGTON IL-RANDOLPH IL-SAINT CLAIR IL-MONROE IL-JEFFERSON MO-
CRAWFORD MO-WASHINGTON MO-SAINT FRANCOIS MO-SAINTE GENEVIEVE MO-
IRON MO-MADISON MO-REYNOLDS MO-
INCLUDING THE CITIES OF FARMINGTON, SPARTA, BELLEVILLE, CAHOKIA, AND
CHESTER
1214 PM CDT MON JUL 27 2026
..EXTREME HEAT WARNING NOW IN EFFECT UNTIL 7 PM CDT TUESDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 110
EXPECTED.
* WHERE...PORTIONS OF SOUTH CENTRAL AND SOUTHWEST ILLINOIS AND EAST
CENTRAL AND SOUTHEAST MISSOURI.
* WHEN...UNTIL 7 PM CDT TUESDAY.
* 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. YOUNG CHILDREN AND
PETS SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME
OUTSIDE. WHEN POSSIBLE RESCHEDULE STRENUOUS ACTIVITIES TO EARLY
MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION
AND HEAT STROKE. WEAR LIGHTWEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PEOPLE IN THE SAINT LOUIS METROPOLITAN AREA CAN GET INFORMATION ABOUT
COOLING CENTERS OR ENERGY ASSISTANCE RELATED TO THE EXCESSIVE HEAT BY
CALLING THE UNITED WAY OF GREATER SAINT LOUIS AT 800-427-4626, OR IF
CALLING FROM A LAND LINE PHONE DIAL 2-1-1. YOU CAN ALSO CALL COOL
DOWN SAINT LOUIS AT 314-241-7668.
ILZ064-069-070-MOZ041-047>052-059-060-062-281115-
/O.NEW.KLSX.HT.Y.0006.260728T0200Z-260729T0000Z/
/O.CON.KLSX.XH.W.0002.000000T0000Z-260728T0200Z/
BOND IL-CLINTON IL-MARION IL-BOONE MO-MONITEAU MO-COLE MO-OSAGE
MO-CALLAWAY MO-MONTGOMERY MO-LINCOLN MO-GASCONADE MO-WARREN MO-
FRANKLIN MO-
INCLUDING THE CITIES OF CENTRALIA, SULLIVAN, COLUMBIA, JEFFERSON
CITY, FULTON, SALEM, WASHINGTON, AND UNION
1214 PM CDT MON JUL 27 2026
...HEAT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 7 PM CDT
TUESDAY...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS
EVENING...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 110. FOR THE HEAT ADVISORY, HEAT INDEX
VALUES UP TO 103 EXPECTED.
* WHERE...PORTIONS OF SOUTH CENTRAL ILLINOIS AND CENTRAL AND EAST
CENTRAL MISSOURI.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 9 PM CDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 9 PM THIS EVENING TO 7 PM CDT TUESDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. 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. YOUNG CHILDREN AND
PETS SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME
OUTSIDE. WHEN POSSIBLE RESCHEDULE STRENUOUS ACTIVITIES TO EARLY
MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION
AND HEAT STROKE. WEAR LIGHTWEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PEOPLE IN THE SAINT LOUIS METROPOLITAN AREA CAN GET INFORMATION ABOUT
COOLING CENTERS OR ENERGY ASSISTANCE RELATED TO THE EXCESSIVE HEAT BY
CALLING THE UNITED WAY OF GREATER SAINT LOUIS AT 800-427-4626, OR IF
CALLING FROM A LAND LINE PHONE DIAL 2-1-1. YOU CAN ALSO CALL COOL
DOWN SAINT LOUIS AT 314-241-7668.
ILZ100-MOZ061-063-064-281115-
/O.NEW.KLSX.HT.Y.0006.260728T0200Z-260729T0000Z/
/O.CON.KLSX.XH.W.0002.000000T0000Z-260728T0200Z/
MADISON IL-SAINT CHARLES MO-SAINT LOUIS MO-SAINT LOUIS CITY MO-
INCLUDING THE CITIES OF SAINT LOUIS, EDWARDSVILLE, ALTON, AND SAINT
CHARLES
1214 PM CDT MON JUL 27 2026
...HEAT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 7 PM CDT
TUESDAY...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS
EVENING...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 111. FOR THE HEAT ADVISORY, HEAT INDEX
VALUES UP TO 102 EXPECTED.
* WHERE...IN ILLINOIS, MADISON IL COUNTY. IN MISSOURI, SAINT CHARLES
MO, SAINT LOUIS CITY MO, AND SAINT LOUIS MO COUNTIES.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 9 PM CDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 9 PM THIS EVENING TO 7 PM CDT TUESDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. 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. YOUNG CHILDREN AND
PETS SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME
OUTSIDE. WHEN POSSIBLE RESCHEDULE STRENUOUS ACTIVITIES TO EARLY
MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION
AND HEAT STROKE. WEAR LIGHTWEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PEOPLE IN THE SAINT LOUIS METROPOLITAN AREA CAN GET INFORMATION ABOUT
COOLING CENTERS OR ENERGY ASSISTANCE RELATED TO THE EXCESSIVE HEAT BY
CALLING THE UNITED WAY OF GREATER SAINT LOUIS AT 800-427-4626, OR IF
CALLING FROM A LAND LINE PHONE DIAL 2-1-1. YOU CAN ALSO CALL COOL
DOWN SAINT LOUIS AT 314-241-7668.
ILZ058>060-065-095>099-MOZ018-019-026-027-034>036-042-280200-
/O.CON.KLSX.XH.W.0002.000000T0000Z-260728T0200Z/
GREENE IL-MACOUPIN IL-MONTGOMERY IL-FAYETTE IL-ADAMS IL-BROWN IL-
PIKE IL-CALHOUN IL-JERSEY IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO-
MONROE MO-RALLS MO-PIKE MO-AUDRAIN MO-
INCLUDING THE CITIES OF LITCHFIELD, VANDALIA, BOWLING GREEN, QUINCY,
HANNIBAL, MEXICO, PITTSFIELD, AND MOUNT STERLING
1214 PM CDT MON JUL 27 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 110.
* WHERE...PORTIONS OF SOUTH CENTRAL, SOUTHWEST, AND WEST CENTRAL
ILLINOIS AND CENTRAL AND NORTHEAST MISSOURI.
* WHEN...UNTIL 9 PM CDT THIS EVENING.
* 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. YOUNG CHILDREN AND
PETS SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME
OUTSIDE. WHEN POSSIBLE RESCHEDULE STRENUOUS ACTIVITIES TO EARLY
MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION
AND HEAT STROKE. WEAR LIGHTWEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
GOSSELIN
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