Quoting the article :

"But this is consistent with climate change," Flannigan noted. "We're getting more days where it's very conducive to very active fire spread – and longer fire seasons....  An area the size of India burns every year. There's a lot of fire globally. But this year has been a devastating year."

https://www.theguardian.com/environment/true-north/2016/may/12/the-arsonists-of-fort-mcmurray-have-a-name