FEMA is an all-purpose bureaucracy, "just add disaster".
Oh, to be sure--they do use all the buzz-terms of effectiveness: "unity of command"; "span-of-control", etc; but in the end they offer a bloated bureaucracy that, although patterned closely after the "military model", ISN'T the military model. Bureaucrats run it--not military officers.
And the "human nature" aspects of forming large "ad-hoc" temp organizations lead to a lack of cooperation, rather than real cooperation. For all its "promise", FEMA does not offer unity of purpose.
FEMA is too unwieldy and cumbersome. It's "top-down management", when "leadership" is called for.
It's a far better idea to fend for yourselves than to depend upon FEMA.