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A third day of smoky air gives millions in US East Coast, Canada a
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Latest Canada wildfire updates: US extends air quality alerts
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Wildfire smoke causes sports cancellations
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Diamondbacks-Nationals game postponed due to air quality
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Canada wildfires: Smoky haze may stay for days - WHYY
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LIVE: Air quality begins to improve, but smoke from Canadian
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Nationals postpone game with Diamondbacks due to poor air quality
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MLB, WNBA postpone games due to smoke from Canadian wildfires
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Wildfire smoke and air quality live updates: Northeast flights