It all depends on several factors (Score 2, Informative)

First factor is how much electrolyte content the water had. I.e. Distilled water is a perfect insulator, no electrolytic content also known as chemically inert. Salt water is at the other end of the spectrum. The reason I know this is from years working on Military electronics in the Navy. The first thing that should have happened would be to immerse the items in as clean of water as possible. This would have reduced the electrolytic properties of the contaminated water by distilling it with the fresh water in a container. Not having that available, then the next step would have been to attempt to clean with any water displacing compount. I.e. WD 40 would work, however that would still need to be removed before operation. The goal would be to break the galvanic corrosion cycle by reducing the electrolyte that provides the return path from the anode to cathode caused by the dissimilar metals. The electronics could still be salvaged if care is taken to thouroughly clean and then "THOUROUGHLY" dry them. I currently work in an industry where we have to repair electronics that are used in Poultry processing, and the rendering process leaves deposits on the electronics that can destroy them if not tended to in a timely manner. Isopropyl alcohol or denatured alcohol will work in cutting oils or other chemicals on a board, however they can also mar the surface of the PCB coatings and leave it prone to corrosive damage unless re-coated with a suitable humidity barrier. Having stated all that, Soap and water to clean is perfectly acceptable, but thourough rinsing to remove the soap and thourough drying is a must. Good luck in the salvage process.