Another air quality alert is in effect Tuesday for NYC, western Long Island, the Hudson Valley, northwest New Jersey and southwest Connecticut.

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.

The run of mild summer weather in the Coachella Valley has come to an end. With smokey conditions likely worsening throughout Aug. 3, an air quality advisory was extended to noon Aug. 4. None pose an immediate threat to land, but some are worth watching.