638
WWUS73 KLSX 280210
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
910 PM CDT Mon Jul 27 2026

ILZ064-069-070-100-MOZ041-047>052-059>064-281715-
/O.EXP.KLSX.XH.W.0002.000000T0000Z-260728T0200Z/
/O.CON.KLSX.HT.Y.0006.000000T0000Z-260729T0000Z/
Bond IL-Clinton IL-Marion IL-Madison IL-Boone MO-Moniteau MO-Cole
MO-Osage MO-Callaway MO-Montgomery MO-Lincoln MO-Gasconade MO-
Warren MO-Saint Charles MO-Franklin MO-Saint Louis MO-Saint Louis
City MO-
Including the cities of Washington, Columbia, Alton, Saint Charles,
Edwardsville, Jefferson City, Saint Louis, Salem, Sullivan,
Centralia, Fulton, and Union
910 PM CDT Mon Jul 27 2026

...EXTREME HEAT WARNING HAS EXPIRED...
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY...

* WHAT...Heat index values up to 102.

* WHERE...Portions of south central and southwest Illinois and
  central and east central Missouri.

* WHEN...Until 7 PM CDT Tuesday.

* 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. 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.

&&

$$

ILZ058>060-065-095>099-MOZ018-019-026-027-034>036-042-280315-
/O.EXP.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, Hannibal, Pittsfield, Mount
Sterling, Vandalia, Quincy, Mexico, and Bowling Green
910 PM CDT Mon Jul 27 2026

...EXTREME HEAT WARNING HAS EXPIRED...

Cooler conditions are expected tomorrow.

$$

ILZ074-079-MOZ072>075-084-085-099-281715-
/O.CON.KLSX.XH.W.0002.000000T0000Z-260729T0000Z/
Washington IL-Randolph IL-Crawford MO-Washington MO-Saint
Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO-
Including the cities of Chester, Sparta, and Farmington
910 PM CDT Mon Jul 27 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY...

* WHAT...Dangerously hot conditions with heat index values up to 106.

* WHERE...In Illinois, Washington IL and Randolph IL Counties. In
  Missouri, Crawford MO, Washington MO, Iron MO, Madison MO, Reynolds
  MO, Saint Francois MO, and Sainte Genevieve MO Counties.

* 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.

&&

$$

ILZ101-102-MOZ065-281715-
/O.CON.KLSX.XH.W.0002.000000T0000Z-260729T0000Z/
Saint Clair IL-Monroe IL-Jefferson MO-
Including the cities of Belleville and Cahokia
910 PM CDT Mon Jul 27 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY...

* WHAT...Dangerously hot conditions with heat index values up to 106.

* WHERE...In Illinois, Monroe IL and Saint Clair IL Counties. In
  Missouri, Jefferson MO County.

* 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.

&&

$$

Kimble