...you should never let your water go dry in the incubator.
But if it happens one time, just one time, you'll have problems with an egg.
Not that we would do something like forget to check it once,
but from what the "big boys" have told me it could be a problem..... *ahem*

So assuming that someone else forgot to check the water one time and let it go dry, it could possibly make the eggshell too dry for the chick to get out.

And if, hypothetically speaking, that happened, the chick wouldn't stand a chance without a Hero to rescue it:

And it might be a messy job. And it might look like one bedraggled chick:

But the chick might just make it: