Hey Carl, I think that I inadvertently tiptoed into tinfoily stuff here. Let me back up...
After a couple of days, here on the coast we could get a couple of local FM stations. One was a lash-up of whatever gear several stations in Biloxi & Gulfport could get to work, the other was a little low-power FM that a ham club in Hancock County runs. But all they were saying was "get your water at the Walmart parking lot, MREs next door at the K-mart parking lot, and there's a temporary tent hospital in front of the flooded-out supermarket." And of course there was WWL-AM in New Orleans, but they were concerned with the New Orleans situation.
What we couldn't get from this local stuff is what was going on in the rest of the country, useful info like "If I scavenge all the gasoline I can and try to drive out, can I get gas when I get close to empty somewhere in the middle of Alabama? Or are pumps dry all over the southeast?" Also, there were rumors going around about upcoming forced evacuations and gun confiscations. Without outside sources, all we had were super-local get-me-through-today repeated announcements of "get your water at the Walmart parking lot, MREs next door at the K-mart parking lot, and there's a temporary tent hospital in front of the flooded-out supermarket." Wash, rinse, repeat. It got eerie after a while, and to be able to get some news, any news, from the rest of America would have been welcome. That's where some decent nighttime AM DX would've come in, if I'd had a radio that was worth a hoot at the time. That's why AM DX is so interesting, and why I think it is vital to any emergency comms plan.
Now about foreign SW, nah, not so important in such times. Perhaps of some interest to dial around on after dark, but not nearly important as domestic AM DX.
Back to the New Orleans stations, I'm not even sure if WWL ever even went off the air. I do remember listening to them that Monday evening and a little bit in the coming weeks, but they were wrapped up – understandably! – in their own situation. Pretty remarkable the job they did.
And... once again, thanks for helping out in this whole mess. Can't say that enough.