Wildfires torching buildings and forcing thousands of people from their homes in Western Canada are also creating smoke hazards stretching into the United States.
Natalie Hasell of Environment Canada says wildfire smoke from British Columbia, Alberta, Saskatchewan and Manitoba has travelled as far as Texas in the United States.
Hassell says smoke from wildfires in Ontario and Quebec may have also floated south to Michigan and the eastern seaboard.
Environment Canada has issued bulletins warning of poor air quality in parts of northern Manitoba and Saskatchewan, where wildfires have forced more than 30,000 people from their homes.
They say conditions will fluctuate but those 65 and older along with youngsters and pregnant people are particularly susceptible to the pollution.
Symptoms could range from eye irritation to chest pains and severe coughing.
This report by The Canadian Press was first published June 4, 2025.
The Canadian Press
