"So Cali is times 10, that sounds about right. Although, not to make light, I bet there are some cheap houses in the Houston area today."

Nope, the houses to which you lightly refer will be mostly purchased by you and I via FEMA (or the Army Corps of Engineers) and bulldozed or built up on higher foundations, the remainder will go up significantly in price after any needed repair. The unaffected houses will increase even more. Thank you for your contribution.