Argh! Poor Attrocities!
I would hold out hope for the hard drives. I'd take them out, let them dry off, and then try to put them into a never-flooded computer which has a disk burner in it, to back up your data. Even if that fails, a hard disk recovery service might be able to rescue your files, since the drive mechanisms and the magnetic disk are two separate parts, and the magnetic data on the disk is a bit less vulnerable than the drive motor etc.
Best of luck on the recovery!
PvK