This was an issue during Katrina. Some police and NG members went to confiscate guns from legal owners there. So after that we passed a law that your guns cannot be confiscated during a emergency or disaster.
" §134-7.2 Prohibition against seizure of firearms or ammunition during emergency or disaster; suspension of permit or license. (a) Notwithstanding any provision of chapter 127A or any other law to the contrary, no person or government entity shall seize or confiscate, under any emergency or disaster relief powers or functions conferred, or during any emergency period, as defined in section 127A-2, or during any time of national emergency or crisis, as defined in section 134-34, any firearm or ammunition from any individual who is lawfully permitted to carry or possess the firearm or ammunition under part I of this chapter and who carries, possesses, or uses the firearm or ammunition in a lawful manner and in accordance with the criminal laws of this State."
This was probably the last pro 2a law signed that wasn't forced by a court case or included with a bunch of BS.
Now this is state law, what the feds/military (Non-national guard) will do is another issue. I'm sure HPD will willingly hand over all reg records to any one who ask during an emergency. Which is why so many are against registration. It only serves 1 purpose, CONFISCATION.