Canadian wildfires have been raging this summer and some of the smoke from those fires already drifted downward into the U.S. over the Great Lakes (see the image feature from July 25 below). In this image collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite on August 02, 2014 the large swath of smoke from these fires has taken a northward track and settled over the Bay of Baffin which borders Greenland.
To view the other Canadian fire images from July 2014:
Smoke from Canadian Fires Hovers Over Great Lakes - July 25, 2014
Smoke From Northern Territories Fires in Canada - July 24, 2014
Fires in the Northern Territories July 2014 - July 23, 2014
Fires and Smoke in Canada's Northern Territories - July 21, 2014
Wildfires in Canada's Northern Territories - July 15, 2014
Northwest Territories, Canada Wildfires - July 07, 2014
NASA image courtesy Jeff Schmaltz, MODIS Rapid Response Team/Credit by Lynn Jenner