356
WWUS73 KLSX 090605
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
105 AM CDT Sun Aug 9 2026

ILZ069-074-079-100>102-MOZ041-047>051-059>065-092115-
/O.UPG.KLSX.XH.A.0003.260809T1700Z-260813T0100Z/
/O.NEW.KLSX.XH.W.0003.260809T1700Z-260813T0100Z/
Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL-
Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-
Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Union, Edwardsville, Jefferson City, Saint
Charles, Chester, Cahokia, Alton, Fulton, Belleville, Sparta, Saint
Louis, Sullivan, Columbia, and Washington
105 AM CDT Sun Aug 9 2026

...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT
WEDNESDAY...

* WHAT...Dangerously hot conditions with heat index values up to 109
  expected.

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

* WHEN...From noon today to 8 PM CDT Wednesday.

* 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.

&&

$$

ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052-
072>075-084-085-099-092115-
/O.NEW.KLSX.HT.Y.0007.260809T1700Z-260813T0100Z/
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion 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-Lincoln
MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve
MO-Iron MO-Madison MO-Reynolds MO-
Including the cities of Vandalia, Quincy, Bowling Green, Litchfield,
Salem, Hannibal, Pittsfield, Mount Sterling, Farmington, Mexico, and
Centralia
105 AM CDT Sun Aug 9 2026

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY...

* WHAT...Heat index values up to 106 expected.

* WHERE...Portions of south central, southwest, and west central
  Illinois and central, east central, northeast, and southeast
  Missouri.

* WHEN...From noon today to 8 PM CDT Wednesday.

* 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.

&&

$$

MRB