Who is responsible for the bush fires?

who is responsible for the bush fires that have been happening all around Australia? we wonder but in particular it was most likely not any ones fault for something like this to happen, unless someone through out a cigarette in a place where there is a lot of grass land and a lot of wind or someone was maybe having a camp in the Forrest and forgot to put it out before they went to bed (bad use of boy scout skills). but the bush fires started from ultraviolet light (the sun) and this happened because the temperature of the days were consistently high all the time. this means that it wouldn’t have taken that long for the ultraviolet light to burn something and start a fire, we have a lot of land going around as that’s what earth is mostly made out of, meaning that it wouldn’t have been difficult for a fire to start or appear out of nowhere. but were trying to do our best to put these fires out and make this disaster stop.