323
WWUS73 KLSX 141820
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
120 PM CDT Fri Aug 14 2026

ILZ070-150930-
/O.UPG.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/
/O.EXB.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/
Marion IL-
Including the cities of Salem and Centralia
120 PM CDT Fri Aug 14 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SUNDAY...

* WHAT...Dangerously hot conditions with heat index values up to 107.

* WHERE...Marion IL County.

* WHEN...Until 9 PM CDT Sunday.

* 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.

&&

$$

ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099-
150930-
/O.EXT.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/
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-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
Including the cities of Chester, Belleville, Jefferson City, Fulton,
Alton, Cahokia, Edwardsville, Union, Sullivan, Sparta, Farmington,
Saint Louis, Columbia, Saint Charles, and Washington
120 PM CDT Fri Aug 14 2026

...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SUNDAY...

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

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

* WHEN...Until 9 PM CDT Sunday.

* 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.

&&

$$

ILZ058>060-064-065-097>099-MOZ035-036-042-052-150930-
/O.EXT.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Pike IL-
Calhoun IL-Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO-
Including the cities of Pittsfield, Litchfield, Mexico, Vandalia, and
Bowling Green
120 PM CDT Fri Aug 14 2026

...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY...

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

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

* WHEN...Until 9 PM CDT Sunday.

* 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.

&&

$$

MOZ026-027-034-150930-
/O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/
Shelby MO-Marion MO-Monroe MO-
Including the cities of Hannibal
120 PM CDT Fri Aug 14 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY...

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

* WHERE...Marion MO, Monroe MO, and Shelby MO Counties.

* WHEN...Until 9 PM CDT Saturday.

* 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.

&&

$$

BSH