Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air.

Chicago had the worst air quality in the world for a few hours Thursday, thanks to smoke from Canadian wildfires.

When wildfires burn, the smoke can travel long distances and degrade air quality far away, which presents risks for those ...

Air quality will deteriorate across 12 states through Saturday, mainly in the Upper Midwest, as wildfire smoke pours into the ...

Smoke from Canadian wildfires continues to choke the skies over the Upper Midwest this weekend, with the milky haze even ...

National Weather Service officials issued an air quality alert set to expire at midnight Saturday for the Chicago and ...

Illinois, Michigan, Wisconsin and Minnesota are under air quality alerts for unhealthy conditions as Canadian wildfire smoke ...

Illinois residents are urged to reduce pollution levels. The air quality is expected to improve by Saturday, according to the National Weather Service. Hannah Hudnall covers trending news for the USA ...

Smoke has continued to cloud Illinois' air for a second straight day, but the poor air quality isn't because of a fire in the ...

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 air quality alert is in place through Friday night. Highs today will be in the upper 70s. It is gusty with wind to around ...

The Chicago Cubs called up prospect Moisés Ballesteros and started him as their designated hitter as the corresponding move for designating infielder Vidal Bruján for assignment.