Ok as a Michigander and one who has never been to Texas...Does Texas have any levees? I knew I should have paid more attention to my geology class in high school.
There are some levees by some bodies of water, but mostly Texas is above sea level. There are low spots. Almost 1/3 of Harris county is in what they call the 100 year flood plain...and the way the winds will be blowing, the rainwater will probably back up and flood some or all of those areas until the winds die down and the bay calms down. But it's not like New Orleans.