My sister was living in Houston when a tropical storm hit (can't remember the name, sometime in the mid 90's?) They didn't have any problem with the wind, BUT the damn thing stalled for about 5 days. They had 18 wheelers floating in the streets. So it's not only the wind you have to worry about it's the rain, tidal surge, tornadoes, etc. Our house was nearly hit by a tornado from Hurricane Hilda; it hit 3 houses down. I had 2 elderly cousins who drowned in Katrina in an affluent neighborhood. Why they didn't leave I don't know, maybe they didn't have a way out.
Trigger11 - I saw the picture of the damaged house where the young boy died. Even being in a house doesn't guarantee your safety.
AFAIK the authorities don't have the authority to make you leave your house, at least in Louisiana. But, I know if it's heading our way we leave because of the Princess Royal's disabilities.