I bet the computers will be just fine, if you give them enough time to dry out.
Open the cases, take all expansion cards out, and hard drives.(label them as to which computer the go in)..towel any visable water off everthing..then wait. If I were you I would wait atleast a week, if not longer just to be sure..whats the
rush right? Use any anti-rust spray on anything that might rust.
Spray, on a rag then apply. take your time..I bet most things will get working again.
Good luck..keep us posted..
Rich
ny