I agree with you that climate change of drier and hotter in that region is making those fires bigger and worse. However, I believe, the bigger problem is the people setting them. Sparks don't just happen, I would say most sparks are from people. Campfires, cigarette butts, electric pole wires, etc. I'm with you bluewave on the fires worse because of climate change but I still believe most of those fires would never exist if it wasn't for people.