Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. A map of the current Air Quality Index, the ...

Air quality in some parts of the United States is worsening as smoke from dozens of wildfires in Canada travels south, pushed by winds high in the atmosphere. Through parts of Minnesota and into ...

As wildfires spread across Canada, air quality in the U.S. continues to be impacted, and people sensitive to air pollution could face "serious health effects," according to a government website that ...

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. As of ...

Smoke from a series of Canadian wildfires has prompted an air quality alert for the region. Wildfire smoke is a complex mixture of gases, particles and water vapor that contains multiple pollutants ...

Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. Map shows air quality alerts in effect Wednesday ...

Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. A map of the current Air Quality Index, the ...

An air quality map shows conditions improving across the United States on Friday as smoke from the Canadian wildfires subsides after prompting air quality alerts and advisories in several states this ...