I'm sure they're fine. You did a good job.
Mind if I ask, How does staggering your hatches work out if you add them all the time? Do you have a separate hatcher that you can clean in between hatches?
How far along are they? Eggs are pretty good at surviving a drop in temps. My broody hatched 3 babies this past week, she got off her nest 1-2 times a day in 30° weather. If they are starting to generate their own heat (the last week or so) they have even better odds. You should probably get...