There's a lot of data on this subject. BuzzFeed News recently had an article about how fires have changed over the past decades: https://www.buzzfeednews.com/ar

There's a lot of data on this subject. BuzzFeed News recently had an article about how fires have changed over the past decades: https://www.buzzfeednews.com/article/peteraldhous/california-wildfires-people-climate https://www.buzzfeednews.com/article/peteraldhous/california... And for the HackerNews-y type, they even made all the data and R code for the visualizations publicly available: https://buzzfeednews.github.io/2018-07-wildfire-trends/ https://buzzfeednews.github.io/2018-07-wildfire-trends/ It is hard to pin the increase on any one cause - it's a confluence of factors. Here's a perspective piece by a few well regarded experts: https://www.theguardian.com/environment/2018/aug/07/california-wildfires-megafires-future-climate-change https://www.theguardian.com/environment/2018/aug/07/californ... One of those experts is Daniel Swain, who has an excellent Twitter account which posts a lot more data: https://twitter.com/Weather_West https://twitter.com/Weather_West