You may have some water in the rims, and it could help rot the tubes and tires, but it would take a while.

A fun thing to do is to find a long, steep hill, and drag your brakes going down it. I don't normally recommend such a thing, but live dangerously just this once! The fun part is you'll quickly find out if there's water in your rims, because if you listen closely, you'll hear steam coming out of the spoke holes. That effectively dries out your rims, and of course you should ride a few more miles with minimal braking to cool the rims down.