“Heat Advisory until 07:00PM Tuesday” from Jefferson County : Nixle

Saturday July 18th, 2026 :: 10:44 a.m. CDT

Advisory

Heat Advisory until 07:00PM Tuesday

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

* WHERE...Portions of southern Illinois and western Kentucky.

* WHEN...Until 7 PM CDT Tuesday.

* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

* ADDITIONAL DETAILS...Higher humidity levels combined with hot temperatures on Tuesday may cause heat index values to near 110 degrees.

* AFFECTED AREAS: JEFFERSON ... HAMILTON ... GALLATIN ... HARDIN ... CRITTENDEN ... LYON ... TRIGG ... CALDWELL ... UNION ... WEBSTER ... HOPKINS ... CHRISTIAN ... MUHLENBERG ... TODD

Instructions:

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Address/Location
Jefferson County
100 S 10th St
Mount Vernon, IL 62864

Contact
Emergency: 9-1-1
Non-emergencies: 618-244-8000

Alert Details

Severity:: Moderate - Possible threat to life or property
Urgency:: Expected - Responsive action SHOULD be taken soon (within next hour)
Certainty:: Likely (p > ~50%)
Category:: Meteorological (inc. flood)
Event:: Heat Advisory

More Messages

See more messages from Mount Vernon, Illinois »

Full Notification