Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast. Air quality alerts were in effect Tuesday in several states, including Wisconsin,

Hazy skies linger over New Hampshire as smoke from the Canadian wildfires drifts overhead. "The sky will continue to have a hazy look to it due to lingering wildfire smoke, particularly across NH where the Air Quality Alert for particle pollution has been extended through today," the National Weather Service forecaster's discussion said.