Where smoke from Canadian wildfires has spread into the U.S.

By Ian Livingston

As dozens of wildfires continue to burn across Canada, flames are sending far-reaching plumes of smoke into the sky and unhealthy air to distant places. Some of the more gigantic blazes have been delivering thick smoke that spread southward into the United States over recent days.

The fires are burning from British Columbia, through Alberta and Saskatchewan to Manitoba and Ontario — with several between 100,000 and 300,000 hectares apiece. More smoky skies are expected as this week begins, although the smoke is not expected to be as thick as it’s been in recent days.