Smoke from ongoing Canadian wildfires has led to some of the worst air quality in the world across parts of the U.S.

When combined with the Philly area’s warm, sunny weather, the incoming smoke stands to increase levels of ozone, the ...

Detroit currently is ranked third worst worldwide for major city air quality today, Aug. 4, because of smoke from Canadian ...

The state of Minnesota is entering another in a long string of summer days marred by air quality alerts. Poor air quality ...

As the air quality in Minnesota remains dangerous, experts are giving advice. "It's not a one-size-fits-all answer," said Dr.

Smoke from Canadian wildfires continues to choke the skies over the Upper Midwest this weekend, with the milky haze even ...

Minneapolis had the fifth worst air quality among 125 cites worldwide on Saturday morning, according to an international air ...

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

The air quality in Minnesota has never been so bad for so long. Experts recommend limiting outdoor activities.

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.