975
WWUS73 KLSX 310403
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
1103 PM CDT Sun Aug 30 2026

ILZ069-074-079-311915-
/O.UPG.KLSX.XH.A.0004.260831T1700Z-260905T0100Z/
/O.EXA.KLSX.HT.Y.0008.260831T1700Z-260905T0100Z/
Clinton IL-Washington IL-Randolph IL-
Including the cities of Sparta and Chester
1103 PM CDT Sun Aug 30 2026

...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY...

* WHAT...Heat index values up to 105 expected.

* WHERE...Clinton IL, Washington IL, and Randolph IL Counties.

* WHEN...From noon Monday to 8 PM CDT Friday.

* 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.

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.

&&

$$

ILZ100>102-MOZ061-063-064-311915-
/O.UPG.KLSX.XH.A.0004.260831T1700Z-260905T0100Z/
/O.EXA.KLSX.HT.Y.0008.260831T1700Z-260905T0100Z/
Madison IL-Saint Clair IL-Monroe IL-Saint Charles MO-Saint Louis
MO-Saint Louis City MO-
Including the cities of Alton, Belleville, Cahokia, Saint Louis,
Saint Charles, and Edwardsville
1103 PM CDT Sun Aug 30 2026

...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY...

* WHAT...Heat index values up to 105 expected.

* WHERE...In Illinois, Madison IL, Monroe IL, and Saint Clair IL
  Counties. In Missouri, Saint Charles MO, Saint Louis City MO, and
  Saint Louis MO Counties.

* WHEN...From noon Monday to 8 PM CDT Friday.

* 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.

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>036-041-042-
047>052-059-060-062-072>075-084-085-099-311915-
/O.CON.KLSX.HT.Y.0008.260831T1700Z-260905T0100Z/
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-Boone MO-Audrain
MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Lincoln
MO-Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds
MO-
Including the cities of Jefferson City, Union, Salem, Washington,
Litchfield, Mexico, Bowling Green, Hannibal, Centralia, Vandalia,
Sullivan, Fulton, Pittsfield, Quincy, Mount Sterling, Columbia, and
Farmington
1103 PM CDT Sun Aug 30 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON MONDAY TO 8 PM CDT
FRIDAY...

* WHAT...Heat index values up to 105 expected.

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

* WHEN...From noon Monday to 8 PM CDT Friday.

* 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.

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.

&&

$$

MOZ065-311915-
/O.CON.KLSX.HT.Y.0008.260831T1700Z-260905T0100Z/
Jefferson MO-
1103 PM CDT Sun Aug 30 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON MONDAY TO 8 PM CDT
FRIDAY...

* WHAT...Heat index values up to 105 expected.

* WHERE...Jefferson MO County.

* WHEN...From noon Monday to 8 PM CDT Friday.

* 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.

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.

&&

$$

Elmore