I would be more worried about the force of the water hitting things and about objects it drags with it than about water damage. One meter of water weighs 1000k

I would be more worried about the force of the water hitting things and about objects it drags with it than about water damage. One meter of water weighs 1000kg/m². If a wave a few meters long slams into a wall of your house, that can easily be more force than that of a decent sized car doing the same.