⚠️ Extreme Heat Warning – Greene; Macoupin; Montgomery; Bond; Fayette; Marion; Adams; Brown; Pike; Calhoun; Jersey; Knox; Lewis; Shelby; Marion; Monroe; Ralls; Pike; Audrain; Lincoln; Crawford; Washington; St. Francois; Iron; Madison; Reynolds – Friday, July 3, 2026

Extreme Heat Warning issued July 3 at 4:10AM CDT until July 3 at 10:00PM CDT by NWS St Louis MO

Details

* WHAT…Heat index values up to 105.

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

* WHEN…For the Extreme Heat Warning, until 10 PM CDT this evening.
For the Heat Advisory, from 10 PM this evening to 8 PM CDT
Saturday.

* IMPACTS…Heat related illnesses increase significantly during
extreme heat and high humidity events. Hot temperatures and high
humidity may cause heat illnesses.

Instructions

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.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.