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Huricane Katerina

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Hurricane Katrina was the most costly and one of the deadliest hurricanes in the history of the United States. It was the sixth-strongest Atlantic hurricane ever recorded and the third-strongest land-falling U.S. hurricane on record. Katrina formed in late August during the 2005 Atlantic hurricane season and caused devastation along much of the north-central Gulf Coast of the United States. Most notable in media coverage were the catastrophic effects on the city of New Orleans, Louisiana. New Orleans is in a really vulnerable position for hurricanes. It lies above the Gulf of Mexico, where lots of the huge storms start. The Mississippi river runs through the middle of town, and Lake Pontchartrain is to its north. ...read more.


The levees protecting New Orleans from Lake Pontchartrain failed in three places; London Avenue, Industrial Canal and at one point in the Main Lake Levee. They did not overflow but instead collapsed due to the increased water pressure. * Flooding: Since 80% of New Orleans is below sea level the water flowed from the lake into the city and most of the buildings were flooded. The power, water and sewage systems were knocked out and the city was rendered uninhabitable. Causes of the Hurricane: * Location: New Orleans' location near the Gulf of Mexico means it is hit by a hurricane every 13 years on average. The hurricane season runs from June 1 to November 30 and September 10 is considered the peak. ...read more.


Its maximum sustained wind power was 280 km per hour and its strongest gust was 346 km per hour. * Hurricane season 2005: The strength and number of storms that form in any year is affected by water temperatures in the Atlantic and the speed of high level winds. * In 2005 the water was warm which meant lots of powerful storms were likely. The high level winds were weak so it was easier for storms to turn into hurricanes. Big storms started appearing earlier than normal and a total of seven named storms had already formed by the end of July. * Nature of the evacuation: The city had been evacuated but it's possible that up to 100,000 people stayed behind. They stayed for a variety of reasons but most were unable to leave because they did not have cars or enough money to organise travel. ...read more.

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