Not sure …there's a lot of other things that should probably happen before you re-glue the fretboard...
As previously stated, remove any excess moisture...which could take months...from everything.
I'd start with confirming there's the structural integrity of the neck itself.
This really is a HUGE undertaking...I wish you all the luck!!!!!
Actually, I'd clean it off and use it as a platform to collect autographs or something, but that's just me....