if it was uncovered and in very heavy rain, you'd be surprised how long it could take for points to dry off. Leave the cover off awhile, and maybe hit it with a hair dryer. Also, look in your oil tank. If you see any milky traces, get your oil changed immediately.. and finally, if you did get water in your tank, it would be great to drain it, but if it's outside your skill set, I'd just add fresh gas and some sta-bil to help evap the water off.
Good luck to you!