Seriously, air quality index went from a 4 to 18 in 24 hours. It jumped from a 6 to 11 in four hours, then to 18 in just two hours. It's so bad I swear it was making my skin hurt.
Wasn't entirely sure what this plane was when I shot it (aside from unusually large for a plane flying low altitude over downtown Edmonton), but suspected it was AA263. Turns out it was.