At least a few of the homes flooded in Houston are McMansions. For example, see this video of rescue efforts in one neighborhood where water is past the first floor of McMansions.
Once the waters recede, what will happen to these McMansions? Critics of such homes argue that they are often poorly built. Are they worth restoring and rebuilding or will homeowners pursue other options? What will communities approve and will they promote other options beyond big single-family homes?
Rarely do suburbs and big cities have opportunities to rethink past development decisions on a large scale. Houston is known for sprawl and a number of commentators (including me) have already suggested that such an approach often does not work well with flooding and water issues. Yet, overturning decades of sprawling suburban development is a difficult task and is likely even harder when residents just want to get back into their homes.