When walls aren’t tied to the floor
The tie down chain has to reach all the way to the ground.
Drag the slider to compare the damage with the fix.
What went wrong
The roof was well connected, but the walls weren’t tied to the floor. The wind lifted the roof and most of the walls away.
The fix
Strap the walls down to the floor, and bolt the floor down to the stumps. Check stumps for rot and rust too.