Well I gave my friends such a lecture on safety one day and tried to make them get out and back into their kayaks near shore of an icey lake but no one wanted to and I think maybe thats why they had their life jackets on when they hit an waterfall and lost the boats out from under them, the boats were sucked under and my friends managed to get out just before the falls.
The camera spent 5 minutes in the river and I opened it up, removed the battery and let it dry out for a week. It works perfectly still. Which is to say that water is used in the manufacturing process of electronics gear, as long as the power is off, fresh water should not hurt electronics equipment.
These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.