Why is the power going off? Can you plug it in to a generator or something? You very well could lose some of the younger ones. Leave the top off. Even if the power comes on for a bit. It's bad to let them cool off and then heat back up so much.
It depends. My family suddenly had to leave on a 5 hour trip and I had some shipped Bobwhite quail eggs in my incubator on day 4. I had to take them with me, there was no one to watch them. I just packaged up all the eggs in a bubble wrap lined box and covered them with a few towels. I held them up the whole time because the road was super bumpy. I thought they would all die, and it was only 65 degrees in the vehicle. We had to stop for about 3 hours on the way there because the truck was having issues and we had to fix them, and then we had lunch. They had been unheated for almost 9 hours by time we got there, and I figured they would have rattled loose from the drive. I let them warm to room temperature for an hour or so and then put them in. We stayed for a week and then made the same trip back again. Out of 13 eggs I had 12 hatch, and these were shipped eggs too. There's still hope, I wish you the best of luck!
Sorry, I don't type too fast, lol
How many eggs are in there right now?
