Although it isn't necessarily waterproof it may have survived serious damage, so first of all take the battery out then give the camera a good shake in all orientations then leave it sitting for about 24 hours in a warm place, after which do the same again and leave it about another 12 hours before trying it out, giving it a final shake before you do. The main thing is NOT to persevere trying to get it to work until you have carried out the procedure mentioned as the longer water conducts the electricity to parts it shouldn't the more the danger of permanent damage being done, so the battery MUST be left out whilst you carry out the aforementioned procedure.