The incredible story of a flood of near-biblical proportions -- its destruction, its heroes and victims, and how it shaped America's natural-disaster policies for the next century. The storm began March 23, 1913, with a series of tornadoes that killed 150 people and injured 400. Then the freezing rains started and the flooding began. It continued for days. Some people drowned in their attics, others on the roads when they tried to flee. It was the nation's most widespread flood ever—more than 700 people died, hundreds of thousands of homes and buildings were destroyed, and millions were left homeless. The destruction extended far beyond the Ohio valley to Illinois, Indiana, Michigan, Nebraska, Pennsylvania, Tennessee, Arkansas, Louisiana, Kentucky, West Virginia, New York, New Jersey, and Vermont. Fourteen states in all, and every major and minor river east of the Mississippi. In the aftermath, flaws in America's natural disaster response system were exposed, echoing today's outrage over Katrina. People demanded change. Laws were passed, and dams were built. Teams of experts vowed to develop flood control techniques for the region and stop flooding for good. So far those efforts have succeeded. It is estimated that in the Miami Valley alone, nearly 2,000 floods have been prevented, and the same methods have been used as a model for flood control nationwide and around the world.

Johnstown is synonymous with floodwaters and steel. When the city was decimated by a flood of biblical proportions in 1889, it was considered one of the worst natural disasters in American history and gained global attention. Sadly, that deluge was only the first of three major floods to claim lives and wreak havoc in the region. The destruction in the wake of the St. Patrick's Day flood in 1936 was the impetus for groundbreaking federal and local flood control measures. Multiple dam failures, including the Laurel Run Dam in July 1977, left a flooded Johnstown with a failing steel industry in ruins. Author Pat Farabaugh charts the harrowing history of Johnstown's great floods and the effects on its economic lifeblood.

March 25, 1913, began as a typical day in Dayton, Ohio. Downtown bustled with streetcars, carriages, and automobiles. By 8:10 a rush of water from the Great Miami River flooded the city. Desperate people climbed trees and telephone poles to escape the torrent. For days, people were stranded, cut off from the outside world. Experience the Great Dayton Flood through the eyes of those who lived it. Today the storm that caused the flood and devastated Dayton and communities across the country is largely forgotten. But the residents of Dayton resolved never to suffer such a disaster again. Their heroic response became a model for how we prepare for and recover from natural disasters.