How wildfires in Alberta lead to poor air quality in the Midwest - KTVZ
Smoke will keep pouring into the US as long as fires are burning in Canada. Here's why they aren't being put out, News
Canadian wildfires bring air quality alert, lower temperatures to Upstate NY
Intense smoke fills NYC and forces a 'code red' in Philadelphia as millions from the East Coast to Canada suffer from Quebec's wildfires
New York air quality worst since 2002
Canada wildfire smoke leads to air quality alert in Philadelphia area - CBS Philadelphia
Wildfire smoke in Michigan resulted in several 'firsts,' EGLE offers air quality resources for Michigan
Canadian wildfires bring air quality alert, lower temperatures to Upstate NY
Canadian wildfire smoke spreads, 100 million Americans under air-quality alerts
Canadian wildfire smoke puts around 70 million US residents under air quality alerts