With 174 active wildfires burning across Canada, several U.S. states are under air quality alerts due to the traveling smoke from these flames.

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 ...

Negotiations over the Columbia River basin could affect the environment in Canada and electrical generation and flood control in the United States. Negotiations of a 60-year-old treaty between ...

Two fires there have burned well past 100,000 hectares (247,000 acres), the largest of which has scorched 189,834 hectares (469,090 acres) on the border with Ontario, about 65 miles northeast of ...

Smoke from wildfires raging in Canada has drifted into the United States, affecting air quality as far south as Florida and creating a "very unhealthy" situation in parts of Minnesota on June 3 ...

With 174 active wildfires burning across Canada, several U.S. states are under air quality alerts due to the traveling smoke from these flames.