Central Pennsylvania's Great Flood of 1889 remains the deadliest in US history, killing more than 2,200 people.

It was the deadliest flood in U.S. history: a foot of rain in less than twenty-hour hours swelled the Little Conemaugh River, breached the South Fork dam, and killed more than 2,200 people. Roker presents a narrative history of the 1889 Johnstown Flood. He chronicles key events, the damage that rendered the flood one of America's worst disasters, and the pivotal contributions of key figures.

Presents a narrative history of the 1889 Johnstown Flood to chronicle key events, the damage that rendered the flood one of America's worst disasters, and the pivotal contributions of key figures, from dam engineer John Parke to American Red Cross founder Clara Barton.

From NBC host Al Roker, a gripping narrative history of the 1889 Johnstown Flood, the deadliest flood in U.S. history.