How much money do we spend for repairing structures destroyed by tornadoes?

It depends on the strength of the tornado. Most tornadoes are rated F0 and F1. These tornadoes can damage roofs, break Windows, and topple some trees. Trailers may be overturned or badly damaged.

Most of the serious damage is cause by the strongest 4% of tornadoes, those rated F3, F4, and F5.

An F3 tornado can largely destroy most houses, sometimes leaving only a few walls standing. Most trees will be uprooted and trailers don't stand a chance.

An F4 tornado will level most houses to the ground and can strip the bark from a tree.

Virtually nothing can withstand the full force of an F5 tornado. Houses are swept clean off their foundations.

F4 and F5 tornadoes have been known to wipe out larges sections of towns.