you should have left last week...filled the car will lots of sensible clothes, your IDs passports, DR, copy of a current electric bill to prove your Houston address, deed to house, home and auto insurance, titles to cars, credit cards, money (you should have gone to the bank for some ready cash), cars filled up with gas...blankets, sleeping bags, tent, food, water, extra diapers, baby stuff, kids report cards and school records in case they have to go to a different school..
FReepers can add to this list...
head west and north as far as possible, to relatives, friends, helpful church, camp ground, cheap motel...
sooner or later all those displaced people have to go somewhere...after Katrina hundreds were flown into our area of TN...most just to continue to receive benefits from the government...
You might have to establish yourself and start from scratch in another state...how would you do that in just boxer shorts and a raincoat and no ID or shoes ???
Anyhoo stay safe and swim real fast theres alligators in that water...