If you've got backup power on now there, it sounds like you're on generator power, and hopefully, it is connected to a different service, or at least a different feeder, than the main commercial line.
Hopefully, the airfield wasn't affected, or else your airfield electricians/ops people/ fireemen will be out there setting up temporary lights one-by-one. A pain to say the least, I know, I've done it.
Tom in NO (at MSY)
"The criminal ineptitude makes you furious"-Bruce Springsteen, after seeing firsthand the damage from Hurricane Katrina