If every human vanished overnight, our dams would crack, cities would drown, bombs beneath the Thames could ignite, and oceans would slowly erase everything we built. This episode follows the terrifying power of water as it turns London, New Orleans, Egypt and the open seas into a haunting world without us. Life After People tells the story of iconic structures from the modern world and how they will crumble and fall in the absence of restoration and repair. The new series reveals how quickly the natural world would overpower the modern world.