Poor air quality is set to hit millions across two states on Tuesday, with the health of vulnerable groups potentially at ...

The alert comes as people in other states have been told to monitor themselves for symptoms such as unusual fatigue and coughing.

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating maps! New data arrives every 30 minutes. Current air quality at dozens of ...

MIchigan's air quality will be unhealthy for some groups Friday. Check the air quality index map to see if it's good or bad ...

The current infrastructure also isn’t set up to fully account for the shifting behavior of wildfire smoke, which can travel ...