JMO but I think Houston will do what they need to do and will be ok.
Most people will... I'm sure. But, from what I'm hearing.. they are being really slow this time to prepare. Many schools are still in session. My sister is still working today at the Dental School.
After the traffic disaster that was Rita... I think, many are deciding to stay home. For most people, that's probably a good idea. But, for people in range of the surge.... well... have a good look at Biloxi on Google.