Ep 1: West of Canyon Lake

A torrent of water rushes out of the Black Hills toward Rapid City. A teenager finds his mother’s home surrounded by raging water, while a man living high above Rapid Creek watches helplessly as homes and lives are swept away below. A real-estate developer is trapped by high water in one of his condominiums, and a young man is thrown into the water when a house breaks apart. Meanwhile, a National Guard soldier struggles to save a family on a rooftop.