Weather Alerts For Mid Missouri, MO

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values of 105 to 110 degrees. WHERE Portions of south central and southwest Illinois and central, east central, and southeast Missouri. WHEN Until 9 PM CDT this evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Sunday, August 16, 2026 at 1:37 AM CDT ISSUED BY Issued by National Weather Service Kansas City/Pleasant Hill MO HEADER URGENT - WEATHER MESSAGE | National Weather Service St Louis MO # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. # AREAS AFFECTED -------------------- Madison MO, Monroe IL, Montgomery MO, Saint Louis MO, Washington MO, Boone MO, Callaway MO, Clinton IL, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Madison IL, Moniteau MO, Osage MO, Randolph IL, Reynolds MO, Saint Charles MO, Saint Clair IL, Saint Francois MO, Saint Louis City MO, Sainte Genevieve MO, Warren MO, Washington IL Including the cities of Washington, Cahokia, Chester, Sullivan, Sparta, Columbia, Jefferson City, Farmington, Edwardsville, Belleville, Saint Louis, Union, Alton, Saint Charles, and Fulton

Closest strike: 2.62 miles Stay Alert! Remain in a safe area until there has been no lightning within 10 miles of this location for 30 minutes. Please be aware that lightning activity can remain high even when a storm is moving away from your location. Even if rain has stopped, do not leave your safe area until WeatherBug indicates that lightning is more than 10 miles away from this selected location. IF OUTDOORS Avoid water, high ground, and open spaces. Avoid all metal objects including electric wires, fences, and machinery. Find a safe area in a building or in a fully enclosed vehicle with the windows completely shut. Unsafe places include underneath canopies, small picnic or rain shelters, convertibles, or near trees. IF INDOORS Avoid water and stay away from doors and windows. Avoid using a hard line telephone. Take off headphones. Turn off, unplug, and stay away from appliances, computers, power tools, and TV sets. Lightning may strike exterior electric and phone lines, inducing shocks to inside equipment.

Pollen Index: 9 Pollen Level: medium-high Predominant Pollen: Ragweed, Chenopods and Nettle. Pollen concentrations for Sunday will be at about the same level in the high range. If you do suffer from allergies, tomorrow should be about as difficult outdoors as it was today.