http://www.cnn.com/2007/TECH/science...ses/index.html

It seems that flooding is starting to hit a lot more of our world around us. So a home developer in the Netherlands has designed 'floating homes'. Two different kinds, 1) those that sit on water all the time and 2) one that sits on dry land but if flooding happens... it can adapt as the water rises.

New Orleans, Mississippi, Texas and surrounding areas... could use these type homes/houses. While reading the article I did not get the impression that the cost/s would be overly high. So maybe it could work.