Ice Age 2: The Meltdown (2006)

Manny, Sid and Diego return in another incredible adventure. The ice age is coming to an end, and the animals are delighting in their new world: a melting paradise of water, parks, geysers and tar pits. But when Manny, Sid and Diego discover that the miles of melted ice will flood their valley, they must warn everyone and somehow figure out a way to escape the coming deluge.

Official website: http://www.iceage2.com