A number of states in the United States have declared air quality warnings with concerning levels noted across many of the ...

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states ...

Air quality alerts are in place for portions of 10 states from Minnesota to Delaware as officials warn the smoke may become dangerous for sensitive groups.

Air quality alerts have been issued across 12 states for Wednesday, according to the National Weather Service.