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 sent smoke pouring across large sections of the country — a problem that’s ...

Millions of Americans across the Midwest, Northeast and swathes of the South and Southwest are under air quality alerts Monday. Newsweek's live blog is closed.

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states ...

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

Wildfire smoke from the Bear Gulch Fire could create “unhealthy or hazardous” air quality conditions in Mason County over the ...

"Wildfire smoke is associated with many of the same health effects that we know for all kinds of outdoor air pollution," UC Berkeley Assistant Professor of Environmental Engineering and Health ...

Canada is battling more than 700 active wildfires across the country, roughly two-thirds of which are burning out of control, ...

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

Wildfire smoke drifting over the Washington, D.C., area is making the skies look hazy and negatively affecting air quality.

Winds could blow smoke from the Bear Gulch fire burning on the Olympic Peninsula, bringing the potential for unhealthy air ...

Across the state, Oregon’s air is getting harder to breathe. The number of days the air quality index was unhealthy for ...