I don’t know much about the area. I am just north of SF.
One of the locals said they would never move to Paradise and that upon viewing it for the first time said it would be a deathtrap in a fire and given the terrain, layout and landscape a huge fire was almost guaranteed.
I believe bad forest management and environmental policies could have been a factor in addition to our drought conditions following record rains.
I also believe arson is a possible cause.
CalFire is investigating a second start to the Paradise fire. There were two origins to the fires.