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.

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 9 a.m., the air quality index was 118, which is considered unhealthy for sensitive groups.

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast. Air quality alerts were in effect Tuesday in several states, including Wisconsin,