The first episode of fires started in Brazil in the summer 2019, large parts of the Amazon Burned up and billions of beasts were killed. The second episode of fires was in Eastern Australia last December, large parts of the Australian bushlands burned up and the wildlife was devastated. Now there is a Third Episode of fires, this time it is in Western North America, mainly in California near cities like San Francisco, it effects urban areas as well as woodlands.
What I think is happening is the atmosphere is getting drier and windier so when careless people start fires and loose control, the effects are much worse. I can't say why it is happening this way. All I know is that the events are regular and we'll spaced out. The continents are small so perhaps smaller continents respond to climate change faster than the big ones.