The smoke floating over the border shared between America and Canada is now impacting air quality in states as far south as ...

As wildfires spread across Canada, air quality in the U.S. continues to be impacted, and people sensitive to air pollution could face "serious health effects," according to a government website that ...

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

Smoke from hundreds of wildfires in Canada has choked the skies over dozens of northern U.S. states in the Great Lakes and ...

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

The Canada-U.S. border is the world's longest undefended border, stretching almost 9,000 kilometres across land and water. Redrawing it in the 21st century, Baird says, would be nearly impossible.