Smoke from ongoing wildfires across Canada continued to drift into parts of the United States on Wednesday, causing hazy skies and triggering air quality alerts in multiple states across the upper Midwest and Northeast.

Air quality alerts remain in effect from Minnesota to the Northeast due to smoke from hundreds of wildfires in Canada. In the West, wildfires in California continue to rage.

Smoke from Canadian wildfires is causing air quality concerns for many Americans in the Midwest and Northeast for another day this week.  Air quality alerts were in effect Wednesday morning in parts of Minnesota,