Chicago and Minneapolis' air quality was in the "unhealthy" category, which ranks as level four of six on the Air Quality Index ...

And as of 11:30 a.m. CT, Chicago and Minneapolis had two of three of the worst air quality indices in the world among major cities, according to IQAir.

According to IQAir, Minneapolis' air quality on Friday morning and through the workday ranked as the second-worst among the world's major cities. Only Kinshasa in the Democratic Republic of Congo ...

As has been the case for several days, Minneapolis and Chicago ranked high on the list of worst air quality readings among major cities across the world on Saturday, according to IQ Air.

Wildfires in Canada are impacting the skies over Minnesota. Here’s what to know when an air quality alert is issued and how to stay healthy amid smoky skies and unhealthy air.