Three things in nature that start fire:
Lightning
Volcanos
Man
So far I have not seen which of these started the fires on Maui. . I suspect the first one or possibly the last one since I have not heard of any volcanic activity in Hawaii lately.
I seriously doubt Climate Change sparked the alien species of grass to suddenly combust.
We had one here start the other day by numbskulls driving a trailer on the rim after a flat tire. Yard mowers. Seemingly, not too bright. They drove on it for several miles.