Big Thompson Flood (Colorado, 1976): A rapid surge of water surging through the Big Thompson Canyon caught residents and tourists off guard, killing at least 144.
Rapid City Flood (South Dakota, 1972): Heavy rainfall caused flash flooding that claimed the lives of 238 people, causing extensive damage to Rapid City and surrounding areas.
Johnstown Flood (Pennsylvania, 1889): The collapse of the South Fork Dam led to a catastrophic flood that killed approximately 2,209 people in the town of Johnstown.
St. Francis Dam Failure (California, 1928): The failure of the St. Francis Dam resulted in a flash flood that claimed the lives of around 431 people in the Santa Clara River Valley.
South Dakota Flood (1972): Apart from the Rapid City flood, the same weather system caused flash floods in other parts of South Dakota, leading to a total death toll of around 238 people.
Big Thompson River Canyon Flood (Colorado, 1938): Flash flooding in the Big Thompson River Canyon caused 150 fatalities, highlighting the region's vulnerability to such natural disasters.
Kansas City Flood (1977): Flash floods in Kansas City, Missouri, claimed the lives of 25 people, causing significant damage to the city's infrastructure.
Big Creek Flash Flood (California, 1964): Heavy rains triggered a flash flood that resulted in 58 fatalities in Big Sur, California.
Pineapple Express Flood (California, 1955): A series of storms caused flash floods and mudslides in Southern California, resulting in 48 deaths.
Cheyenne River Flood (South Dakota, 1972): In addition to the Rapid City flood, the Cheyenne River experienced flash flooding that caused 238 fatalities in total across the state.