Chances are it will be "Rethug" types shouldering the lion's share in helping these people dig out - Faith-based organizations, the U.S. military, corporate philanthropy, the people who actually pay taxes in this country, etc.
I doubt you'll see the trust fund WTO protestors, Dykes On Bikes, NARAL, or any DUACers shuttling down there to man the shovels or the field hospitals or the food banks. They'll have more important things to do, like discussing the latest Photoshop job on Bobby Jindal's portrait.