The first levees were built 4,000 years ago in China on the Yellow River. Since then, they have been breeched more than 1500 times. The worst flood happened in 1931, killing for 850,000 people.
Before Katrina, the worst American levee disaster happened in 1927 on the Mississippi River. 246 people were killed and another 700,000 were displaced.
During the Little Ice Age, New York Harbor froze and people could walk across it to Staten Island.
At some points, the Thermohaline Circulation is moving the equivalent of 100 Amazon rivers.
In 1974, a tanker transporting Liquefied Propane Gase collided with another large ship in Tokyo Bay. Despite the large gash on the side of the tanker, no LPG was released into the water and there was no explosion or fire.
In 1942, while working on the Manhattan Project, Dr. Robert Oppenheimer studied the Halifax explosion to calculate the explosive power of the atomic bomb.
It took 11 ½ minutes for the shock waves to travel across the Pacific Ocean – and be registered on seismographs in Japan.
In just nine days after the earthquake, the Southern Pacific Railroad transported 300,000 people on their ferries and trains. All free.
Cost to rebuild San Francisco:
1906: 1 billion
2006: 300 billion projected
There are over 1,000 sites in San Francisco containing hazardous or toxic materials that would be affected in a major earthquake.
The 1938 hurricane produced enough lumber from downed trees to build 200,000 homes.
Category 4 or 5 northern Atlantic hurricanes have increased 56 percent over the last 35 years.
Seismic waves from the Alaskan megadisaster traveled around the earth. The whole world vibrated like a church bell for weeks after the earthquake.
One of the most destructive tsunamis ever was on August 26, 1883, after the explosion of the Krakatoa volcano. Waves reached 135 feet in Java and Sumatra.
Oak Lawn Tornado 4/21/1967
16.2 mile damage path
Tri-State Tornado 3/18/1925
Speed: 72 mph
Path: 219 miles
Duration: 3.5 hours
Cyclone of 1896
Buildings Damaged: 8800
Economic Impact Today: 3 billion dollars
Mega Myth: Mobile homes attract tornadoes.
Mega Reality: They don't attract twisters, Mobile homes are more easily damaged by even mild tornadoes.
Mega Myth: Open your windows so a tornado's low pressure won't make you house explode.
Mega Reality: The pressure won't explode your house. Opening windows is a dangerous waste of time.
The ash from the last three Yellowstone eruptions would fill the Grand Canyon
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