Piglet is entirely surrounded by water by A.A. Milne.

It rained and it rained and it rained. Piglet told himself that never in all his life, and he was goodness knows how old – three, was it, or four? – never had he seen so much rain. Days and days and days.

With Piglet trapped by the flood, his message in a bottle may be the only hope. Fortunately, Pooh finds the bottle. Unfortunately, he can’t read the message. But Christopher Robin can, and that, along with Pooh’s Brilliant Idea, sets the rescue mission on its wobbly way.