Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as ...

Unhealthy air-quality levels include: Orange AQI level (101-150): Unhealthy For Sensitive Groups The general public is less likely to be affected by the poor air quality. But members of vulnerable ...

New York City faces another air quality alert Thursday, along with some of the surrounding area. The alert will be in effect from 11 a.m. to 11 p.m. for the city, as well as Long Island, the ...

All 21 counties in New Jersey are under air quality alerts on Friday, because of a combination of smoke from a huge forest fire and low-level ozone pollution from warm, stale air.But the situation ...