Dan's eggs went down to 50 and he got a 70%ish hatch rate, I believe, and Ralphie had a 100% hatch rate with eggs left on the top of the bator for a while at 75* temps... They should be fine.Update:
I couldn't see through the monitor because the power went out at our house for 3 hours. Luckily it only got down to 84, but it may have killed the hatching chicks. I do not hear chirping, but the temp is rising. We left early for the chickens and will be getting home about three hours earlier. Hopefully both chicks make it.