Before the Flood is a 2016 documentary film about climate change directed by Fisher Stevens. The film was produced by a collaboration between Stevens, Leonardo DiCaprio, James Packer, Brett Ratner, Trevor Davidoski, and Jennifer Davisson Killoran. Martin Scorsese is an executive producer.

As revealed by DiCaprio on September 9, 2016 at the Toronto International Film Festival, the documentary has debuted October 30, 2016 on the National Geographic Channel.As part of National Geographic's commitment to covering climate change, the documentary was made widely available and free of charge on various platforms.