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. Prime fire season in Canada is just beginning, though already about half a year’s worth of land has been scorched, according to the long-term average. [a paid subscription is required to read this article]

Related content:

• The Washington Post – How to Protect Yourself from Wildfire Smoke [also requires a paid subscription]
• CBC News – Here’s where wildfire smoke is spreading in Canada and the U.S.