On July 24, 2004, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’Aqua satellite captured this image of dozens of fires burning in northern Canada southeast of Great Slave Lake (top part of image, to the left of center).
Image by Jesse Allen, based on data from the MODIS Rapid Response Team, NASA-GSFC
Smoke form fires in northern Canada, and possibly from as far away as Alaska, was spreading south and east across North America in late July 2004.