Canada, which is home to some of the world’s largest tracts of boreal forest, ... The New York Times publishes maps that track air quality and wildfire smoke in the United States and Canada.

Online map tools and resources let you track the Canadian wildfires and monitor poor air ... Canada, on Friday, May 30, 2025. [Photo: Nasuna Stuart-Ulin/Bloomberg via ... World Changing Ideas.

Wildfire smoke from Canada is expected to move over the U.S., and maps and satellite imagery show the large-scale impact of the blazes.

The results suggest that between May and September, the smoke caused local cooling of as much as 5.4°C (9.7°F) in small parts of Canada, and that the northern hemisphere as a whole was 0.9°C (1 ...