Small particles can get lodged in crevices of organs from lungs to arteries, causing inflammation and other health issues.

Smoke from hundreds of wildfires in Canada has choked the skies over dozens of northern U.S. states in the Great Lakes and ...

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.  Air ...

Hazy skies settled over Hampton Roads this week as smoke from wildfires in Canada and the West moved over the region. The ...

The wildfire areas of Manitoba and Saskatchewan are projected to receive 50 millimeters to 100 millimeters of rain this ...

Smoke drifting south from Canadian wildfires has made skies in Pennsylvania and other states hazy this week. The Pennsylvania ...

Smoke from wildfires in Canada continue to impact Greater Akron. An Air Quality Alert has been issued for northern Ohio for ...

Rep. Calvin Callahan joined lawmakers from Iowa, Minnesota and North Dakota in filing a formal complaint against Canada over ...

An air quality alert is in effect for all of Massachusetts as smoke from Canadian wildfires descends into the Boston area.

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

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

Canadian wildfire smoke will lend a hazy appearance to the sky, and high clouds blanket much of the Philadelphia region, ...