bridgman, National Guards are under each state's control, and can only be ordered into action by that state's governor. Specifically speaking, there is an Alabama National Guard.

As for evac plans, each municipality (through its police force) is responsible for evacuating a city, with assistance from the State Police and National Guard.

The federal government's role is to aid and assist the local governments after the event - typically in clean up, long term housing and rebuilding.

That being said, a governor CAN ask for federal assistance and can also turn over control of the National Guard to Federal control, and the President can take control of a National Guard unit for a Federal mission.

Here is an excerpt from the Pennsylvania National Guard's mission statement :

In reply to:

During peacetime, the Governor, through the State Adjutant General, commands the Pennsylvania Guard forces. The Governor can call the Guard into action during local or statewide emergencies, such as storms, drought, and civil disturbances, to name but a few. Additionally, the President of the United States (Commander-In-Chief) can activate the National Guard to participate in Federal missions. Examples of this are the many Pennsylvania Guard units that over the years have deployed to support operations in theaters overseas or here in the States.