Hydro

Hydro is a map in Call of Duty: Black Ops II. It takes place on a large hydroelectric dam facility set in Pakistan, which contains multiple chokepoints. Once per match/round, the dam is flooded and kills anyone and anything (players, equipment and Scorestreaks) standing in the way of the rushing water.

Trivia

 * If the player throws a Smoke Grenade at the spillway, no smoke will be emitted.
 * When the wave comes through the flood gate, it will be acknowledged and announced to all players by a Pakistani announcer.