Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.

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

Chicago was listed as the worst air quality in the world for part of Aug. 1 because of smoke from the fires blowing southeast ...

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

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

A thin veil of hazy smoke from Canadian wildfires blanketed the Kansas City sky early Friday, making the air unhealthy from ...

Every air quality monitor in Minnesota is reporting red or unhealthy conditions for everyone, an official said.

Smoke from widespread wildfires in Canada prompted air quality alerts across several Midwest and Northeast U.S. states this ...

An air quality alert covering the entire state of Minnesota continues on Thursday, marring otherwise fairly ideal weather ...

The elevated levels of fine particulate matter resulting from wildfire smoke could present significant health risks.

Officials warned young children and those with respiratory illnesses to take precautions. For weeks, smoke from Canadian ...