Hazy skies descend over the New York City area again on Tuesday, re-upping some air quality alerts related to Canadian wildfire smoke. As of 10 a.m., the air quality index was 121, which is considered unhealthy for sensitive groups.

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,