Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast into Tuesday.

Massachusetts could see hazy skies throughout the day Monday as wildfire smoke from Canada drifts into the Bay State. The smoke prompted National Weather Service forecasters to issue an Air Quality Alert blanketing the entire state, warning that the air may be unhealthy for sensitive groups.

An air quality alert is in effect today for NYC, as well as Dutchess, Orange, Putnam, Rockland, Sullivan, Ulster and Westchester counties.