Great post, Richie! Sorry to hear about what you and your neighbors are going through, but glad to hear you all still have a roof over your heads.
I've been through plenty of long power outages, but never one in which gas stations ran out of fuel.
An EV charge lasts a while undriven. Long spells of extreme temperatures on both ends can impact it. Obviously, the most significant drain on the EV battery is driving it. It all depends 
If any charging stations have power, I can only imagine the wait time at those. It takes a few minutes to fill up a gas tank. It takes roughly 40 mins to fully charge at a stage 3 charger... 14 hours at stage 2... if you have something like a Nissan Ariya.
For those who have an EV as a second or third vehicle, the bigger issue is flooding. Sheriffs were warning their EV-owning community members to park their EVs away from the house during the storms. If the battery corrodes to the point of flames, that fire ain't going out. Fire departments employ special flame retarding blankets to smother EV fires with and usually have to tow them away on a flatbed while still "on fire." The fire department has to escort that flatbed to a place where the EV can continue to burn safely. Now imagine a burning EV parked somewhere the fire department and tow truck cannot get to anymore 
