Wednesday marked a flurry of cancelled and postponed athletic events on the East Coast as wildfires in Canada triggered air quality alerts.

That trend continued when the Washington Nationals postponed their matchup with the Arizona Diamondbacks on Thursday.

The game, initially set for 1:05 p.m. Eastern Standard Time, won't take place until June 22.

This comes as Washington D.C. area residents experience worse air quality than yesterday. Levels on Thursday triggered a "Code Purple" designation in some areas. Those are the most dangerous air conditions, marking a 201 to 300 air quality index. Surrounding areas are also seeing Code Red (unhealthy) and Code Maroon (hazardous) levels toward Baltimore.