Smoke from numerous Canadian wildfires is again impacting the Philadelphia region this week, with environmental authorities ...

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

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

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

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

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

The smoky air is predicted to reach New York City on Monday, and it could bring unhealthy air quality for sensitive groups.

Several wildfires burning across the northwestern Canadian provinces are again sending vast amounts of smoke into the upper ...

Canadian wildfire smoke has worsened the air quality in multiple states and irritated the eyes, noses and throats of many Americans.

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring relief later in the week.