Chicago's air quality plummeted on July 16, 2026, as smoke from Canadian wildfires enveloped the city, pushing the Air Quality Index (AQI) to alarming levels.
Why it matters: The hazardous air quality poses serious health risks, particularly for vulnerable populations. Officials are urging residents to take precautions and limit outdoor activities.
By the morning of July 16, Chicago's AQI reached around 180, categorizing it as "unhealthy" in many parts of the city.
Waukegan recorded even worse conditions, hitting "very unhealthy" levels, and parts of northwest Indiana briefly entered the "hazardous" category.
The Illinois Environmental Protection Agency declared an Air Pollution Action Day for much of northern Illinois, alerting residents to the deteriorating air quality.
The National Weather Service has issued an Air Quality Alert for nearly the entire Chicago area, effective through the evening of July 16.
Driving the news: The smoke is a result of numerous wildfires raging across Canada, which have become increasingly common over recent summers. The timing coincides with a heat wave in Chicago, where temperatures hovered around 90 degrees, exacerbating pollution effects.
Health officials are advising residents to stay indoors as much as possible to avoid exposure to harmful particles found in wildfire smoke.
Even healthy adults may experience symptoms such as irritated eyes, coughing, and shortness of breath with prolonged outdoor exposure.
Residents are encouraged to wear well-fitting N95 masks if they must go outside and to keep windows closed to minimize indoor smoke infiltration.
The big picture: The combination of wildfire smoke and ground-level ozone creates a dangerous scenario for anyone spending time outdoors. This year's air quality issues highlight the growing impact of climate change on urban environments.
Chicago's current AQI of 291 marks it among the worst cities for air quality nationwide.
Officials are monitoring the situation closely, as the adverse effects of smoke are felt in health and in local events and activities.
The Chicago Park District has moved some summer programming indoors and canceled others due to the poor air quality conditions.
What they're saying: Chicago Fire FC's match against the Vancouver Whitecaps, scheduled for the evening of July 16 at Soldier Field, has been rescheduled due to health concerns.
Dave Baldwin, President of Business Operations for Chicago Fire FC, expressed disappointment but emphasized that "health and safety must come first." He acknowledged the excitement surrounding the match and the anticipated home debut of star player Robert Lewandowski.
The match will now take place on Tuesday, October 6, 2026, and tickets purchased for the original date will remain valid.
Baldwin noted the importance of prioritizing fan safety during this challenging time.
By the numbers: The AQI readings provide a stark illustration of the air quality crisis in Chicago.
Chicago's AQI reached 180 in some areas, categorizing it as "unhealthy" for sensitive groups.
Waukegan reported "very unhealthy" levels, and parts of northwest Indiana briefly hit the "hazardous" category.
The forecast indicates that winds, showers, and thunderstorms could begin clearing the smoke by Friday afternoon, July 17.
What's next: As conditions improve, residents are hopeful for relief from the smoke and heat.