Heat Advisory issued August 15 at 2:19AM CDT until August 18 at 8:00PM CDT by NWS St Louis MO

Mon, 08/18/2025 - 08:00

* WHAT...Heat index values up to 108 expected. * WHERE...Portions of south central and southwest Illinois and east central and southeast Missouri. * WHEN...From noon today to 8 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

https://alerts.weather.gov/cap/wwaatmget.php?x=MOC510&y=0