I've never been North of Edmonton, but the vegetation in the Canadian forests seems to be primarily Evergreens. If those trees are not receiving sufficient water, they become almost like standing cans of gasoline. A lightning strike, etc., can trigger a massive forest fire in regions with a high density of Evergreens. If such an area is suffering any extended periods of drought, it is at high risk for a major fire.
Something that does bother me in all of this is my governments failure to at least thank Russia for their offer of help (water bombers, etc) in the fighting of this fire. Apparently the offer was made last week and there has been no response and frankly, I think that is deplorable. I realize that Stephen Harper's miserable obnoxious attitude about Russia set a tone, but I would have hoped that we would have gotten past that stupidity to allow at least common politeness to prevail. I'm seriously disappointed in our Safety Minister, Mr. Goodale in this regard and informed his office yesterday of that disappointment.