Heat issue! Will eggs still hatch?

[Reefpimp]

On day 17-18 my incubator was bumped to 120 degrees for upto 12 hours.
These are bantom silkies and are due to hatch tomorrow.
Is it still possible they could hatch or are they goners?
what ya think

 

[Limey]

I don't know about chickens, but my mom incubates peachicks and they are incredibly sensitive to heat change and last year a lot of them died because they got too hot and dried out. Maybe you could compensate by giving them more moisture so they don't dry out...?