I've pulled out my fair share of Texans.
If I were handed the Department of Homeland Security I'd build me a framework that any civic-minded organization could plug into. Centralize the rescue response. Categorize the response needed. Coordinate the responders. Make "FEMA" a name people want to hear again, like "Red Cross." If people want to help, let them. If people want to run around in the woods playing commando, give them a mission to do. A tenuous leash beats tar out of no leash at all and if I can give a bunch of preppers a reason to not immediately distrust their local Sheriff's Department we all win.