Weather Alerts For Mount Olive, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT SATURDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values up to 107. WHERE Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. WHEN Until 8 PM CDT Saturday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Friday, September 4, 2026 at 3:26 AM CDT ISSUED BY National Weather Service St Louis MO HEADER URGENT - WEATHER MESSAGE # 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. 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. # AREAS AFFECTED -------------------- Calhoun IL, Franklin MO, Marion IL, Adams IL, Audrain MO, Bond IL, Boone MO, Brown IL, Callaway MO, Clinton IL, Cole MO, Crawford MO, Fayette IL, Gasconade MO, Greene IL, Iron MO, Jersey IL, Knox MO, Lewis MO, Lincoln MO, Macoupin IL, Madison MO, Marion MO, Moniteau MO, Monroe MO, Montgomery IL, Montgomery MO, Osage MO, Pike IL, Pike MO, Ralls MO, Randolph IL, Reynolds MO, Saint Francois MO, Sainte Genevieve MO, Shelby MO, Warren MO, Washington IL, Washington MO Including the cities of Hannibal, Centralia, Sullivan, Salem, Mount Sterling, Jefferson City, Columbia, Bowling Green, Union, Mexico, Fulton, Vandalia, Chester, Washington, Quincy, Farmington, Litchfield, Sparta, and Pittsfield

Pollen Index: 11.7 Pollen Level: high Predominant Pollen: Ragweed, Chenopods and Nettle. Based on past pollen counts and expected weather conditions, pollen levels for Friday will remain stable in the extremely high range. This is a result of stable temperatures. Pollen producing plants are at a relatively steady level of pollination at this time.