Air quality conditions across several U.S. cities reached levels this week that federal agencies deem "unhealthy for sensitive groups," prompting health alerts and recommendations that children and ...

Air Quality Numbers Explained: As pollution in Delhi continues to rise without pause, residents are constantly checking the AQI levels to decide when it might be safe to step outdoors. Air Quality ...

COLUMBUS, Ohio — As West Virginia is experiencing a wildfire, many Ohioans smelled smoke outside early Sunday as southerly winds carried it into central Ohio. A cold front moved across the state and ...

Add Yahoo as a preferred source to see more of our stories on Google. Wildfires in Canada are sending heavy smoke across the northern U.S., and New Jersey is experiencing some unhealthy air pollution.

A fast-moving wildfire continues burning in New Jersey's Pine Barrens as of Wednesday afternoon -- already consuming 12,000 acres and only being 35% contained, according to officials. For Wednesday, ...

The New York State Department of Environmental Conservation has issued an Air Quality Health Advisory for Ground Level Ozone from 11 a.m. to 11 p.m. on Monday. Air quality levels outdoors are ...