Tens of thousands of people who fight wildfires spend weeks working in toxic smoke and ash wearing only a cloth bandanna, or ...

Air quality has taken a serious hit across the United States as a two-fold blow of wildfires in the West and in Canada have ...

Smoke from Canadian wildfires has blanketed Michigan this summer, with 31 days of warnings for parts of Michigan..

Firefighters were concerned Sunday about the possibility of fire spreading under trees and a warming forecast later in the ...

Firefighters are tackling a major moorland wildfire for a sixth day, with smoke from the blaze visible up to 80 miles (128km) ...

While the smoke is worst along the Western Slope where the fires are burning, levels are also fluctuating on the Front Range.

Researchers found that wildfire smoke can raise ozone to dangerous levels, posing hidden health risks even in remote areas.

Montana Fire sparks in Slate Canyon, Provo. Crews battle blaze in rugged terrain; no evacuations yet as officials urge ...

Republican lawmakers are blaming Canada for not preventing and containing wildfires, whose smoke has fouled the air in ...

Several rounds of wildfire smoke have been moving into Denver, Boulder, Fort Collins and communities up and down the I-25 ...

The smoke from the wildfires that burned through Los Angeles in January smelled like plastic and was so thick that it hid the ...