I myself just lost power to my house for a whole week - and I can sympathize with your concern, but I can assure you everything should be OK!
As your location says you are in the US, I would'nt be worried. Its just the end of summer now, so unless you house somehow got below 50 F while you were away I wouldnt be too concern!
Your leos probably slowed down their eating habits, or didnt eat at all once the heater was turned off. If they are healthy than this isnt too big a deal. Some leos can go a month or more without eating at all because they have plenty of stored fat.
Just get the tank back to its regular warm temps and provide them with slow/easy to catch food. Within no time at all they should be eating regularly again!