Johnstown, Pennsylvania, has faced several devastating flood events in
its history, including the "Great Johnstown Flood of May 1889." This
weekend marks the anniversary when another such event occurred in 1977. A
train of heavy thunderstorms moved over the area, dropping up to 12
inches of rain on the hills surrounding Johnstown. Runoff from the rain
swelled Little Conemaugh River and smaller creeks and caused the Laurel
Run Dam and Sandy Run dams to collapse. That sent a 10-foot-high wall of
water into Johnstown, sweeping away residents in their homes and cars.
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