00:00By 2050, some of the world's most famous cities could be underwater.
00:04And it's happening faster than most people think.
00:07Amsterdam, already sitting below sea level, is watching the ocean rise twice as fast as it did last century.
00:13Venice is sinking and facing more floods than ever.
00:17Bangkok is dropping into the ground, and parts could vanish in just a few years.
00:21Ho Chi Minh City is sinking 16 millimeters every year, putting millions at risk.
00:25And in the U.S., New Orleans and Miami are racing against the clock as water creeps higher and higher.
00:32From Shanghai's River Delta to Alexandria's historic coast, from the Maldives to Rio de Janeiro,
00:38rising seas are threatening homes, history, and entire cultures.
00:42These aren't distant doomsday predictions.
00:44They're warnings.
00:46And the clock to protect these cities is ticking.
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