Weather Alerts For Centreville, IL

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM CDT TUESDAY # DETAILS -------------------- WHAT Heat index values up to 107 expected. WHERE Portions of south central and southwest Illinois and central, east central, and southeast Missouri. WHEN From 11 AM to 7 PM CDT Tuesday. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Monday, September 14, 2026 at 11:30 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. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. # AREAS AFFECTED -------------------- Saint Clair IL, Bond IL, Clinton IL, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Madison IL, Madison MO, Marion IL, Moniteau MO, Monroe IL, Osage MO, Randolph IL, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO, Washington IL, Washington MO Including the cities of Alton, Belleville, Edwardsville, Washington, Sullivan, Sparta, Centralia, Chester, Union, Salem, Saint Louis, Farmington, Jefferson City, Saint Charles, and Cahokia

Pollen Index: 9.2 Pollen Level: medium-high Predominant Pollen: Ragweed, Chenopods and Nettle. Pollen concentrations for Tuesday will be higher than they were today in the high range. This forecast of higher pollen concentration is based on higher temperatures and windy conditions.