On Monday at 11:40 a.m. the National Weather Service reported an updated air quality alert in effect until Tuesday at midnight for Passaic, Hudson, Bergen, Essex and Union counties.

Canadian wildfire smoke brought numerous air quality alerts to the Northeast on Aug. 4, including in multiple North Jersey counties.

Millions of people across the Upper Midwest and the Northeast are under air quality alerts Monday, as smoke from wildfires in Canada drift over the region