States across the U.S. are feeling the impact of the Canadian wildfires as air quality takes a hit from the smoke, according to a government website that tracks air quality in the United States.

Breathing in polluted air for extended periods of time can pose a serious health risk for people, especially for vulnerable populations.

Air quality alerts continue for millions as wildfire smoke crosses the border from Canada. Plus, the intense heat fueling wildfires in the West.

Wildfires that tore through Los Angeles early this year may have caused hundreds more deaths than official reports show, new research suggests. While the fires were said to have taken 31 lives, a study published Wednesday in the Journal of the American Medical Association estimates that about 440 more deaths may be linked to the disaster.

More than 800 structures are threatened by a massive wildfire in central California that left at least three people injured as it burned through Los Padres National Forest. This report is from Aug. 5 at 8 a.

More than 1,800 firefighters were deployed to the area close to the Spanish border

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