- Hot weather could cause a fire to start.
-Thunder could light a fire.
-Propane tank could explode if left in the sun as it would get too hot and its age could also be an factor.
-Cars should be able to explode if in a crash, maybe if some part has taken too much damage?
I think it would be a great addition because it would make end game more dangerous as you have a lot of resources in your base and there is a risk for all it to burn down.
It would make sense as there are no fire officers to put out the fire.
Anyway I think it is a great mod idea if not added to the game.