Wildfire smoke worsens air quality Wildfire smoke has been fouling U.S. air quality for several days, starting in states bordering Canada, including the Dakotas, Minnesota and other Midwestern states.

Since 2016, wildfire smoke has had a statistically significant effect on PM 2.5 trends in 35 out of 48 continental states, according to Dr. Burke and Dr. Childs’s study.

At least 20 U.S. states are under air quality alerts on Friday morning as Canadian wildfire smoke lingers in the East for another day before it's forecast to dissipate over the weekend.

Massive wildfires raging across western and central Canada are triggering evacuations. Those fires are sending hazardous smoke to the northern U.S. Gavin Newsom proposes $2,000 asset eligibility ...

Researchers examined 36 years of wildfire data in the eastern United States, focusing on fires that burned large areas. The overall trend for the region showed an increase in fire size, frequency ...

Yet wildfires in the western United States have grown so extreme that some tree species, like the giant sequoia, that have evolved to coexist with fires for thousands of years are being killed in ...

The risk of wildfires and property destruction has become so prevalent in states like California that earlier this year, insurer State Farm discontinued 72,000 home insurance policies in the state.