An air quality alert is in effect for all of Massachusetts as smoke from Canadian wildfires descends into the Boston area.

Canada is experiencing a terrible wildfire season with nearly 4,000 wildfires so far this year, close to a record pace.

The National Weather Service reported an updated air quality alert at 10:15 a.m. on Monday in effect until 11:15 p.m. for Northern Worcester and Southern Worcester as well as Franklin, Middlesex, Essex,