It appeared that, as of Friday, Chicago-area residents wouldn't get a reprieve from poor air quality in the near future.

It appeared that, as of Friday, Chicago-area residents wouldn’t get a reprieve from poor air quality in the near future. ...

Chicago faces health concerns due to smoke from Canadian wildfires, leading to an "unhealthy" air quality alert.

Friday morning, Chicago's air quality showed a PM 2.5 of 157. Typically, anything above 100 is considered to be hazardous to at least some groups, and anything over 150 is considered to be “unhealthy, ...