Air quality alerts are in effect on Tuesday in 10 states as toxic smoke from hundreds of wildfires burning in Canada continues to waft into the United States, creating hazy, gray skies over major metropolitan areas, including New York City.

Smoke from wildfires burning in Canada has caused air quality alerts for parts of New York state, including New York City.

Raging wildfires in Canada are impacting millions of people across the U.S. and the smoky air is triggering hazardous Air Quality Alerts from the Great Lakes to New York City. On Tuesday morning, New York City had the ninth-worst air quality in the world,