What do I do if my iPhone screen is red because of water damage?

So my iPhone slipped out of the back of my pocket & into the toilet. Now its been water damaged for about 3-4 hours now & at one time it would allow me to make calls & text messages-the normal- but now that I am home from work, i have a red screen showing on my iPhone. Theres no way that I can take it apart as of now because of the stores being closed already. & the nearest wal mart is pretty far. What do I do? Its currently in a ziploc full of rice. Will that at least do SOMETHING? HELP! HELP! HELP!