Quote:
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Originally Posted by albed
It's called statistics; a type of math. A lot of things in life must suprise you if you don't understand it.
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from Popular Science in May 2005:
The Saffir-Simpson hurricane scale defines a category-5 storm as one with "winds greater than 155 miles per hour and storm surge generally greater than 18 feet." Although hurricanes of this magnitude slamming directly into New Orleans are extremely rare—occurring perhaps every 500 to 1,000 years—should one come ashore, the resulting storm surge would swell Lake Pontchartrain (a brackish sea adjoining the Gulf of Mexico), overtop the levees, and submerge the city under up to 40 feet of water. Once this happened, the levees would "serve as a bathtub," explains Harley Winer, chief of coastal engineering for the Army Corps's New Orleans District. The water would get trapped between the Mississippi levees and the hurricane-protection levees. "This is a highly improbable event," Winer points out, "but within the realm of possibility."