360
WWUS73 KLSX 191628
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
1128 AM CDT Sun Jul 19 2026

ILZ095-MOZ018-019-026-027-034>036-042-052-200730-
/O.EXB.KLSX.HT.Y.0004.260720T1700Z-260721T0100Z/
Adams IL-Knox MO-Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-
Pike MO-Audrain MO-Lincoln MO-
Including the cities of Quincy, Hannibal, Bowling Green, and Mexico
1128 AM CDT Sun Jul 19 2026

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

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

* WHERE...In Illinois, Adams IL County. In Missouri, Audrain MO,
  Lincoln MO, Knox MO, Lewis MO, Marion MO, Monroe MO, Pike MO, Ralls
  MO, and Shelby MO Counties.

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

* 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.

&&

$$

ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099-
200730-
/O.CON.KLSX.HT.Y.0004.000000T0000Z-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 Farmington, Jefferson City, Fulton, Saint
Charles, Saint Louis, Alton, Columbia, Union, Chester, Sparta,
Cahokia, Belleville, Washington, Sullivan, and Edwardsville
1128 AM CDT Sun Jul 19 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY...

* WHAT...Heat index values of 100 to 110 at times.

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

&&

$$