38°35'N / 89°59'O / Altitud 179 m / 08:30 09/09/2026, America/Chicago (UTC-5)
del: 09/09/2026, 12:00
a: 09/09/2026, 17:45
* WHAT...Heat index values up to 107 expected. * WHERE...Portions of south central and southwest Illinois and southeast Missouri. * WHEN...From noon today to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
St. Clair,St. Clair
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.
NWS St Louis MO
09/09/2026, 02:40