I feel so lucky. Power went out here at 4am. I have a Seio on a 2400va UPS just incase something like this happens so I have some water flow. The Seio runs for about 6 hours on the UPS. There is no way I could run a heater on the UPS. I went to work at 7am and got home at 7pm. Both of my tanks were down to 62 and the UPS died about 6 hours earlier!!! On my way home I picked up a 5550watt generator from a buddy at work and got it hooked up ASAP. So far only my Coral Beauty and my Green Bubble Coral are dead. I guess only time will tell on the rest of the tank but everything is looking good so far. My zoos have all opened back up, my brains have expanded, none of my SPS are bleached, and my Euphyllia collection is expanded as well. At those temps I am absolutely amazed I did have a total loss.
I wish the best of luck to everyone else out there. If anyone needs help with anything, let me know.