Can Chicago Fire play Vancouver Whitecaps tonight? Air quality, AQI, wildfire smoke impact potential MLS postponement

MLS returns to action on Thursday from its break for the World Cup.The schedule includes the Chicago Fire hosting the Vancouver Whitecaps at 7:30 p.m. local time in Chicago.The air quality, though, which has been impacted by wildfire smoke coming from northern Minnesota and across the Canadian border, doesn't look ideal.Professional sports leagues have postponed matches for poor air quality before, so it wouldn't be unprecedented to consider if something could be in play in Chicago on Thursday night.Can Chicago Fire and Vancouver Whitecaps play tonight?Nothing is inherently stopping the Fire and Whitecaps from playing, but the Air Quality Index (AQI) numbers in Chicago are far from ideal.As of 12 noon Central Time, the AQI in Chicago is at 244.That falls in the "very unhealthy" category.Be