Wham Bam, Beware of the Clam The Plastic Man Comedy/Adventure Show : Season 1 Episode 2

A sentient clam with a pirate captain-motif, called "The Clam" steals a water-controlling machine from the Chinese government. The Chief tells Plastic Man the machine is in Italy, however, that was a false report by the Clam's hoods, leaving New York City undefended for the Clam to make a tsunami, evacuating NYC and flooding it completely except for the top floors of the tallest buildings, allowing the Clam and his underlings to commit robberies as all the banks and department stores are now submerged.