Air quality warnings show PM2.5 particles at dangerous levels. Learn why today's hazy sky is a toxic soup that's damaging ...

The worst air in the country on June 14 is in New Castle County. The air quality index in Wilmington as of 9:45 a.m. was 227, which is "very unhealthy," according to AirNow. A monitor in Newark was at ...

On Saturday at 10:18 a.m. the National Weather Service reported an air quality alert in effect until Sunday at midnight for ...

An air quality alert was reported by the National Weather Service on Saturday at 10:18 a.m. in effect until Sunday at ...

Rain continues in much of northern Alberta, clearing wildfire smoke and helping firefighting efforts across the province.

An 'Orange Alert' means air pollution concentrations within the region may become unhealthy for people of sensitive groups ...

Depending on your age, health condition, and the level of air quality alert, it is recommended that you make activities ...

Another air quality alert​ has been issued for the Tri-State Area, this time for central and southern New Jersey.

At 10:13 a.m. on Friday, the National Weather Service reported an air quality alert in effect until 11 p.m. for Passaic, ...

Smoke originating from wildfires raging across several Canadian provinces is slowly improving across the northern Plains and eastern U.S. on Friday.

There were no air quality alerts across the U.S. early Friday, following a flurry of warnings partly linked to wildfires in ...