Chicago air quality hits 'very unhealthy' category as Canadian wildfire smoke infiltrates Midwest
Canadian wildfire smoke is infiltrating the Midwest on Tuesday, and the air in Chicago has deteriorated to the Air Quality Index's "very unhealthy" category. Canadian wildfire smoke is infiltrating the Midwest on Tuesday and the air in Chicago has deteriorated to the Air Quality Index's "very unhealthy" category. The AQI in hazy Chicago reached 250 on Tuesday afternoon. Any number over 100 is considered unhealthy for sensitive groups. Haze obscures the Chicago skyline, June 27, 2023. Teresa Crawford/AP Children participate in a summer camp on Montrose Beach as buildings behind the shore are blanketed in haze from Canadian wildfires, June 27, 2023, in Chicago. Kiichiro Sato/AP MORE: Canada breaks record for annual wildfire smoke emissions: Copernicus Chicago Mayor Brandon Johnson warned in a statement Tuesday, "We recommend children, teens, seniors, people with heart or lung disease, and individuals who are pregnant avoid strenuous activities and limit ...