CHICAGO (WLS) -- Air Quality Alerts remain in effect for the Chicago area Friday due to smoke from Canadian wildfires.

While air quality was in the "unhealthy for sensitive groups" category in Chicago, it was even worse in some suburbs.

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, ...

The hazy skies in the Chicago area are the visible sign of the poor air quality Thursday as smoke from Canadian wildfires ...

Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

Wildfire smoke from Canada turned Chicago into one of the world’s most polluted metro areas as the Lollapalooza music ...

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian ...

Smoke from Canadian wildfires settled over Chicago Thursday, with air quality reaching “unhealthy” levels for everyone. Air ...

Smoke from wildfires blazing across Canada is once again wafting over huge portions of the Midwest and worsening air quality, ...

Three U.S. cities ranked among the top 10 for worst air quality in the world Tuesday morning as smoke from Canada fires hit Chicago and the Midwest.

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, ...