Almost one year ago, the Oakland Athletics and Seattle Mariners played a full game at Safeco Field with an AQI (Air Quality Index) of 220 due to wildfire smoke. Anything over 200
Canada wildfires make NYC's air quality worst since 1960s, officials say; Games postponed, parks and libraries impacted - CBS New York
Intense smoke fills NYC and forces a 'code red' in Philadelphia as millions from the East Coast to Canada suffer from Quebec's wildfires
PHOTOS: Skies over Canada and U.S. darkened by hazardous wildfire haze
Poor air quality expected to linger 'the next few days' in the northern U.S.
Due to poor air quality, the White Sox game against the Yankees in New York has been called off
11) Where's the smoke headed next, and when will this end?
Canada Wildfire Photos in New York City
Intense smoke fills NYC and forces a 'code red' in Philadelphia as millions from the East Coast to Canada suffer from Quebec's wildfires
Ominously smoky sky at Yankee Stadium : r/baseball
Yankees vs. White Sox game postponed due to wildfire smoke in NYC
Over 100 million in eastern US warned of 'unhealthy' air as Canadian wildfire smoke spreads south, west