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 ...

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 ...

Several states were experiencing 'unhealthy' levels of air pollution on Monday morning, according to data from the Environmental Protection Agency. Smoke from wildfires in parts of the westernmost ...