Both the Red Cross
and the Salvation Army
will be on the ground in the devastated areas as soon as it's safe.
If you can afford it, they both do good work during hurricane recovery. It would be wonderful if they had less to do.
Update: If you wouldn't mind, could you send some good thoughts to the men and women of the Louisiana and Mississippi Guard who have been deployed to the Persian Gulf. From personal experience it is really tough to know your family and friends need your help and you can't be there.