Millions breathing hazardous air as smoke from Canadian wildfires
Canada wildfires: Smoke blanketing U.S. could last for days
Yankees vs. White Sox game postponed due to unbreathable air in
Belmont cancels racing, Nationals postpone game due to poor air
Canada wildfire smoke live updates: Worst air in years hits
US East Coast Continues to Grapple with Wildfire Smoke Billowing
Air quality in NYC could improve Friday as Canada wildfires rage on
Intense smoke fills NYC and forces a 'code red' in Philadelphia as
A third day of smoky air gives millions in US East Coast, Canada a
MLB postpones games as wildfire smoke continues to wreak havoc