Weather Alerts For Cottage Hills, IL

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING # DETAILS -------------------- WHAT Heat index values of 100 to 110 degrees. WHERE Portions of south central and southwest Illinois and central, east central, and southeast Missouri. WHEN Until 7 PM CDT this evening. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ADDITIONAL DETAILS This is the fourth straight day with heat index values of 100 degrees or higher over parts of the area. ISSUED AT Tuesday, July 21, 2026 at 2:48 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 -------------------- 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 Sparta, Farmington, Chester, Washington, Cahokia, Saint Louis, Alton, Sullivan, Belleville, Fulton, Edwardsville, Columbia, Jefferson City, Saint Charles, and Union

# HEADLINE -------------------- AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT # SUMMARY -------------------- The Illinois Environmental Protection Agency in Springfield Illinois is forecasting unhealthy conditions for sensitive groups (USG) for fine particulates from wildfire smoke until midnight CDT tonight. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. Residents are urged to reduce pollution levels. Air quality forecasts and tips on how you can reduce your emissions can be found at www.airnow.gov. Media Contact...217 558 1536. # DETAILS -------------------- ISSUED AT Monday, July 20, 2026 at 12:24 PM CDT ISSUED BY Issued by National Weather Service Kansas City/Pleasant Hill MO HEADER Air Quality Alert Message | Relayed by National Weather Service St Louis MO # AREAS AFFECTED -------------------- Calhoun IL, Marion IL, Adams IL, Bond IL, Brown IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Monroe IL, Montgomery IL, Pike IL, Randolph IL, Saint Clair IL, Washington IL Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Quincy, Mount Sterling, Pittsfield, Alton, Edwardsville, Belleville, and Cahokia

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER GREAT LAKES INTO THE LOWER MISSOURI VALLEY SUMMARY Severe thunderstorms capable of producing damaging wind gusts, severe hail, and a couple of tornadoes will continue across portions of the Upper Great Lakes and Lower Missouri Valley through late tonight. 01Z Update Water-vapor imagery and VWP data indicate a robust midlevel wave and accompanying belt of 50-60-kt west-northwesterly flow overspreading the Upper Midwest, and this feature will continue east-southeastward across the Great Lakes region tonight. In the low-levels, an attendant cold front will continue east-southeastward across this region as well. In the Upper Great Lakes and Midwest, 50-60 kt of deep-layer shear (sampled by regional VWPs) oriented perpendicular to the cold front and a relatively narrow corridor of strong pre-frontal buoyancy (around 3000 J/kg MLCAPE) will continue to promote semi-discrete supercell structures. Locally damaging wind gusts, severe hail, and a couple of tornadoes will be possible with this activity, given ample low-level hodograph curvature (around 250 m2/s2 effective SRH) beneath the core of a 40-kt LLJ. This activity will generally spread east-southeastward across parts of Lower MI tonight, where a continued risk of damaging wind gusts, severe hail, and a tornado or two will continue ahead of the cold front before encountering increasingly stable air. Farther south, a couple organized clusters are tracking southward across parts of southern IA and western IL. Given strong cold pools with this activity, the primary concern will be severe wind gusts and isolated/sporadic hail. These storms will continue tracking south-southeastward along a surface-based buoyancy gradient before gradually weakening overnight.