At the risk of joining a thread with a lot of silliness and personal bickering, I can tell you the legal answer.
The storm preparations and immediate aftermath are the legal responsibility of local and state officials. There is, however, a tremendous amount of coordination with federal agencies like the National Hurricane Center and FEMA...and it works a lot better than people with political agendas from either side would like to admit.
In Florida, which is what we are talking about in this particular thread (except for those of you who just don't like each other

), the Governor has the authority to order mandatory evacuations. (That is not true in all states.) If that happens, local police agencies have the authority -- and in fact DO -- go into areas and remove people who decline their invitation to leave. The timing and logistics of all evacuations -- voluntary or mandatory -- are the responsibilities of local officials, although obviously they consult heavily with NHC.
In the aftermath of a storm, the entire process is the legal responsibility of the local and state authorities UNLESS they decide they can't handle it and ask for federal help. The federal response is a menu kind of thing, so you can select one type of aid and decline others.
Constitutionally, the federal government CANNOT step in and take over. In addition, there is a federal law prohibiting the U.S. military from performing law enforcement functions within the boundaries of the U.S., which is why you heard so much emphasis the other day about all those National Guard troops remaining under the control of the governors.
Some level of federal help is requested in virtually every storm situation, and that assistance is coordinated by FEMA. Contrary to popular belief, FEMA does not take over any local or state functions...nor do they take over the responsibilities or command of any federal agencies. They are a coordinating agency, and it's a very collaborative situation with everybody working together.
In a major storm recovery, all levels of government participate and each has their own specific responsibilities. For example, in Hurricane Andrew, we had some projects funded and controlled by FEMA, some funded federally and by state funds and controlled by state government, some by county government, some by city governments, and even a large component by a big non-profit set up by the business community.
I know that is not what everyone wants to hear, but that's how it works.
You can go back to fighting now...enjoy.