I understand the sentiment but those casinos may be one of the few places available for emergency housing. Most have large hotels nearby which may be the only place the refugees can stay for a few weeks while the water subsides and the infrastructure is rebuilt.
It won't be like *living* in a hotel (room service, etc.) but it is a place where you can lay down and sleep. For some people, that's all they're going to have for awhile.
The casinos themselves are on barges aren't they?