Total Disasters
You have started a new game some time ago with the disaster option marked and now get annoyed of lightning striks that set your buildings on fire, tornadoes that tear down your accurat planted trees or raiders that pillaging your town?
Then maybe this mod is for you.
You have the option to set custom configurations for lightnings, tornados and raiders and there are easy radio buttons for switching off tornados and raiders at all.
I am not totally sure if all configurations in detail are already implemented but give it a try (e.g. changing the tornado radius seems not to do anything).