Image: Photo by Ian Waldie/Getty Images
About This QuizFloods hold a prominent spot in the creation myths of many cultures, and today they kill more people every year than any other weather phenomenon. How much do you know about floods?
What caused the famous 1889 flood in Johnstown, Pa.?
sudden ice melt in the Allegheny Mountains
a broken dam
On May 31, 1889, after days of torrential rain, the South Fork Dam burst near Johnstown, sending the waters of Lake Conemaugh roaring downhill. The flash flood killed more than 2,000 people in a matter of minutes.
The Arno River flooded in _____, causing major damage to the art collections of Florence, Italy.
Art historians worked for years to restore Florence's art after the flood in 1966.
What's a muddy flood?
a flood caused by runoff on farmland
Muddy floods happen when heavy storms on cropland cause a great deal of runoff. They've increased in some areas because of new home construction and the planting of erosion-sensitive crops.
a flood caused by a landslide
obviously, a flood with a lot of mud in it
One of the world's largest moving structures is a flood barrier. Where is it located?
The massive Maeslantkering, which was completed in 1997, protects the port of Rotterdam in the Netherlands. As of July 2009, it hadn't yet been tested by a major storm.
According to the National Flood Insurance Program, what's the chance of the average American home sustaining flood damage in the course of a 30-year mortgage?
The organization says the risk is 26 percent, compared to a 9 percent risk of fire damage.
What should you do if a flash flood is approaching you?
Climb to higher ground any way you can.
According to Weather.com, 95 percent of people killed in flash floods tried to outrun the flood. What you should do is climb to higher ground out of the path of the flood.
Run as fast as you can.
Go limp and let the flood waters carry you.
How much rapidly moving water can knock a person down?
3 inches (8 centimeters)
6 inches (15 centimeters)
It only takes 6 inches (15 centimeters) of fast-moving water to bring you down.
1 foot (30 centimeters)
In the floods of 1993, how many of the Mississippi River's 1,300 levees failed?
More than 1,000 of the levees failed, but all of the major cities were saved by flood walls.
What percentage of the city of New Orleans was flooded after Hurricane Katrina in 2005?
Because of the failure of the city's levee system, 80 percent of New Orleans flooded.
How high was the wall of water that hit Shadyside, Ohio, in a flash flood on June 14, 1990?
9 to 12 feet (2.7 to 3.6 meters)
12 to 15 feet (3.6 to 4.5 meters)
15 to 20 feet (4.5 to 6 meters)
After thunderstorms drenched Southeastern Ohio that day, three tributaries of the Ohio River flooded and sent a 15- to 20-foot (4.5- to 6-meter) wall of water into Shadyside, killing 26 people.
Photo by Ian Waldie/Getty Images