That would make sense, since 38.4 is about a degree high for a forced air, so an early hatch is not surprising. But that also means the other eggs likely aren't just running behind due to low temperature

If you're candling and not seeing any movement, they very well may have passed away. If you want to give them a couple more days to be sure, that's okay.
If they don't hatch at that point, I would assume they are dead, and carefully open the shell over the air cell (in case they're not dead, since opening over the air cell won't cause bleeding if they are alive). Then I would look them over to see what went wrong. It sounds like it may have been a case of the humidity being too high throughout incubation, in which case you will probably see excess liquid in the eggs.
Hopefully
@Loopeend can pop in and say what they use for humidity, since they are in your area. I personally use 30%, but my climate is likely different from yours.