do not try to start the motor until it is in a dry place. first take out all of your spark plugs and disable fuel/spark and crank it to get out any water that may have found it's way into your cylinders. once you are sure it is dry, check your oil for any signs of water. if all checks out you can put your plugs back in and try to crank it. when and if it starts pay close attention to the idle and sound it makes. if there is any sound or thought of a problem shut it off immediately. if not, i would still suggest you not drive it for a few. maybe just put it through a few heat cycles to monitor it.