Weather Alerts For Port Byron, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT SATURDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values of 100 to 110. WHERE Portions of northwest and west central Illinois, east central and southeast Iowa, and northeast Missouri. WHEN Until 7 PM CDT Saturday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Friday, September 4, 2026 at 2:37 AM CDT ISSUED BY National Weather Service Quad Cities IA IL 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. # AREAS AFFECTED -------------------- Henderson, Jefferson, Cedar, Clark, Des Moines, Hancock, Henry IA, Iowa, Johnson, Keokuk, Lee, Louisa, McDonough, Mercer, Muscatine, Rock Island, Scotland, Scott, Van Buren, Warren, Washington Including the cities of Aledo, Fairfield, Sigourney, Marengo, Moline, Oquawka, Muscatine, Keosauqua, Iowa City, Rock Island, Macomb, Memphis, Washington, Burlington, Carthage, Tipton, Kahoka, Fort Madison, Wapello, Davenport, Bettendorf, Monmouth, and Mount Pleasant

Pollen Index: 11.1 Pollen Level: high Predominant Pollen: Ragweed, Chenopods and Nettle. The quantity of pollen grains in the air for Saturday will remain relatively stable in the very high range. No change doesn't mean no pollen, it just means that pollen producing plants are delivering pollen at a steady pace.