On September 8, 1900, Galveston, Texas, the wealthiest and most sophisticated city in the state, was erased in a single night when a hurricane drove the sea over the island, killing up to 12,000 people and creating the deadliest natural disaster in U.S. history. This episode tells the story of a city that refused to believe it could be destroyed, the meteorologist who assured them it never would be, and the survivors who later raised the entire island out of the sea and built a massive seawall to hold the Gulf at bay.