No the fires are caused more by people than anything else. Either through arson accident or ignorance. The predominant reason of their increased severity is because people are moving into areas they shouldn’t. This exposes them to greater impact and prevents taking measures such as preventative burns from being used. Read the article and understand the facts presented. If global warming is having an impact it is much less significant than these other things. I know it’s easier to blame great conspiracies or mysterious elements but remember Occam’s razor....the simplest answer is usually the right one.