There are hotels with available space still available, even down by Hobby Airport and into the NASA area. Even Galveston has availability ...
So the first question is - where would you go? Family, friends, hotel? And how would you get there? In Houston, if part of your trip includes I45, I10, 99, 610 or Beltway 8 you may never get there.
What is the danger that you face? As many in Houston have noted, planning for bugging out looks way different today than it did last Friday.
Who is involved? Do you care for the elderly or infants? Pets? Goldfish will survive, at least until eaten. Otherwise you need to provide food and a place to eliminate said food upon usefulness.
Jobs? My neighbor is a fire chief. His world just can't be done via telecommuting. Me? Get me a phone line and/or an internet connection and I work from anywhere. Amarillo looks pretty good about now.
Finances? What a real mess for everyone involved. This will be a three to five year recovery, as locations from Corpus to San Antonio to Austin to New Orleans will be involved. Over 12,000,000 people and businesses involved.
And EVERYONE in Texas better get prepared for your next insurance bill.
Houston doesn’t have zoning laws. What could possibly go wrong? If your house has been flooded twice in the past 50 years, you shouldn’t be able to get flood insurance. Same with any other natural disaster.