Air Quality Alert Extended in Chicago as Canadian Wildfire Smoke Lingers
A regional air quality alert remains in effect through Sunday as smoke from Canadian wildfires keeps the Chicago area’s AQI at unhealthy levels, prompting health officials to advise limiting outdoor activity.
An air-quality alert covering the Chicago metropolitan area has been extended through Sunday after a plume of smoke from wildfires in Canada pushed the AQI to a level classified as unhealthy. The index fell to 156 on Sunday, down from a peak of about 747 on Thursday, and forecasters expect further improvement overnight into Monday as wind patterns shift. The National Weather Service also prolonged the alert for parts of northwest Indiana.
Meteorologists warned that smoke could drift back into the region later in the week, while a separate Level 2 severe-weather risk is in place for Monday, with possible mid-day showers and a cold front that may bring strong storms in the evening.
Health experts highlighted the risks of fine particulate matter in wildfire smoke. Dr. Soledad Cortina, an ophthalmology specialist, noted that the particles can cause lasting damage similar to that from tobacco smoke. Dr. Juanita Mora of the American Lung Association urged residents to stay indoors when possible, stay hydrated, and use vehicle recirculation mode to limit exposure. HVAC technician Karol Derezinski advised checking air-filter condition, noting that a clogged filter may appear clean but still block light.
The haze has reduced visibility at O’Hare International Airport, contributing to flight delays. Officials continue to monitor conditions as the region adapts to the ongoing smoke event.