Data source: National Weather Service (NWS)

Extreme Heat

Heat Advisory (ADVISORY) - expires September 9, 2026 at 9:00 PM EDT

Areas affected: Jefferson; Wayne; Edwards; Wabash; Perry; Franklin; Hamilton; White; Jackson; Williamson; Saline; Gallatin; Union; Johnson; Pope; Hardin; Alexander; Pulaski; Massac; Gibson; Pike; Posey; Vanderburgh; Warrick; Spencer; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Crittenden; Lyon; Trigg; Caldwell; Union; Webster; Hopkins; Christian; Henderson; Daviess; McLean; Muhlenberg; Todd; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madrid

Heat Advisory issued September 9 at 3:14PM CDT until September 9 at 8:00PM CDT by NWS Paducah KY

- WHAT...Heat index values up to 108\.

• WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri.

• WHEN...Until 8 PM CDT /9 PM EDT/ this evening.

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

• ADDITIONAL DETAILS...Areas which receive heavy rain or thunderstorms this afternoon will see earlier relief from today's heat.

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

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.

Source: NWS Paducah KY

Heat Advisory (ADVISORY) - expires September 9, 2026 at 6:45 PM EDT

Areas affected: Clinton; Marion; Washington; Randolph; St. Clair; Monroe; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds

Heat Advisory issued September 9 at 2:40AM CDT until September 9 at 7:00PM CDT by NWS St Louis MO

- 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.

What to do: 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.

Source: NWS St Louis MO

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.