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WWUS73 KLSX 171601
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
1101 AM CDT Fri Jul 17 2026

ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099-
180715-
/O.NEW.KLSX.HT.Y.0004.260718T1700Z-260722T0000Z/
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 Edwardsville, Alton, Sparta, Columbia,
Jefferson City, Washington, Cahokia, Chester, Belleville, Union,
Saint Louis, Farmington, Fulton, Sullivan, and Saint Charles
1101 AM CDT Fri Jul 17 2026

...HEAT ADVISORY IN EFFECT FROM NOON SATURDAY TO 7 PM CDT TUESDAY...

* WHAT...Heat index values 100 to 105 expected.

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

* WHEN...From noon Saturday to 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.

&&

$$