Smoke from more than 100 wildfires blazing in Canada is expected to spread to impact air quality in more U.S. state.

A ridge of high pressure allowed smoke to filter into parts of the Northeast almost all week. While the smoke never made it's ...

Smoke from Canadian wildfires started making air quality worse in the eastern U.S. on Wednesday as several Midwestern states ...

The ongoing Canadian wildfires have reportedly blanketed a third of the United States, affecting millions, with the National ...

Smoke from Canadian wildfires spread over a third of the US, with poor air quality in parts of New York, New England, and the ...

A series of wildfires burning across central Canada sent smoke billowing into the U.S. over the weekend, with few signs that ...

As wildfires burn out of control in Canada, smoke is stretching cross the border into the United States, with some states ...

Wildfires in Canada have triggered widespread evacuations and hazardous air quality alerts across the northern United States.

Parts of Montana, North Dakota, South Dakota, Minnesota, Iowa and Illinois had swaths of air quality warnings ranging ... air pollution and increased health concerns.