[potato3732842]

There is a non-trivial crime factor in every crisis that provokes a large subset of society to flee.

If areas were having small semi-annual fires cleaning out the brush rather than these once per several decades monsters there wouldn't be the need for people to flee and there wouldn't be the same crime impact. And routinely dealing with small fires would make all the organizations involved better practiced when the big ones some around.

[pvaldes]

Those areas would be burning exactly the same as before, starting in 20 places at 4 AM in the most windy night of the year. The criminals just would bring a can of gasoline.