PM2.5 — is expected to push the Air Quality Index over 100, reaching levels unhealthy for sensitive groups, including ...

Smoke from Canadian wildfires continues to affect air quality across the Midwest, though Monday’s conditions were an ...

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.

State officials on Monday issued an air quality health advisory for most of Western New York and other regions through ...

Millions of people across the Upper Midwest and the Northeast are under air quality alerts Monday, as smoke from wildfires in ...

The Wisconsin Department of Natural Resources re-extended its air quality alert statewide as wildfire smoke lingers.

An air quality alert was issued by the National Weather Service in Mount Holly at 9:39 a.m. on Monday, Aug. 4.

The Pennsylvania Department of Environmental Protection declared a continuation of its “Code Orange” Air Quality Action Day ...

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring relief later in the week.

The mid-Hudson Valley is expected to have an air quality index of 101 Aug. 4, which is unhealthy for at-risk groups.

Minneapolis had the fifth worst air quality among 125 cities worldwide on Saturday morning, according to an international air ...