Katrina, Hurricane


Katrina, Hurricane

  tropical cyclone that struck the southeastern United States in late August 2005. The hurricane and its aftermath claimed more than 1,800 lives, and it ranked as the costliest natural disaster in U.S. history.

 The storm that would later become Hurricane Katrina surfaced on Aug. 23, 2005, as a tropical depression over the Bahamas (Bahamas, The), approximately 350 miles (560 km) east of Miami. Over the next two days the weather system gathered strength, earning the designation Tropical Storm Katrina, and it made landfall between Miami and Fort Lauderdale, Fla., as a category 1 hurricane (a storm that, on the Saffir-Simpson scale, exhibits winds in the range of 74–95 miles per hour [119–154 km per hour]). Sustained winds of 70 miles per hour (115 km per hour) lashed the Florida peninsula, and rainfall totals of 5 inches (13 cm) were reported in some areas. The storm spent less than eight hours over land. It quickly intensified when it reached the warm waters of the Gulf of Mexico (Mexico, Gulf of).

  On August 27 Katrina strengthened to a category 3 hurricane, with top winds exceeding 115 miles per hour (185 km per hour) and a circulation that covered virtually the entire Gulf of Mexico. By the following afternoon Katrina had become one of the most powerful Atlantic storms on record, with winds in excess of 170 miles per hour (275 km per hour). On the morning of August 29, the storm made landfall as a category 4 hurricane at Plaquemines Parish, La., approximately 45 miles (70 km) southeast of New Orleans. It continued on a course to the northeast, crossing the Mississippi Sound and making a second landfall later that morning near the mouth of the Pearl River. A storm surge more than 26 feet (8 metres) high slammed into the coastal cities of Gulfport and Biloxi, Miss., devastating homes and resorts along the beachfront.

 In New Orleans, where much of the greater metropolitan area is below sea level, federal officials initially believed that the city had “dodged the bullet.” While New Orleans had been spared a direct hit by the intense winds of the storm, the true threat was soon apparent. The levee system that held back the waters of Lake Pontchartrain (Pontchartrain, Lake) and Lake Borgne had been completely overwhelmed by 10 inches (25 cm) of rain and Katrina's storm surge. Areas east of the Industrial Canal were the first to flood; by the afternoon of August 29, some 20 percent of the city was underwater.

 New Orleans Mayor Ray Nagin had ordered a mandatory evacuation of the city the previous day, and an estimated 1.2 million people left ahead of the storm. However, tens of thousands of residents could not or would not leave. They either remained in their homes or sought shelter at locations such as the New Orleans Convention Center or the Louisiana Superdome. As the already strained levee system continued to give way, the remaining residents of New Orleans were faced with a city that by August 30 was 80 percent underwater. Many local agencies found themselves unable to respond to the increasingly desperate situation, as their own headquarters and control centres were under 20 feet (6 metres) of water. With no relief in sight, and in the absence of an organized effort to restore order, looting became widespread. Stories of helicopter rescues from rooftops in the flooded Ninth Ward soon mixed with tales of anarchy from the crowded Superdome.

 On August 31 the first wave of evacuees arrived at the Red Cross shelter at the Houston Astrodome, some 350 miles (560 km) away from New Orleans, but tens of thousands remained in the city. By September 1 an estimated 30,000 people were seeking shelter under the damaged roof of the Superdome, and an additional 25,000 had gathered at the Convention Center. Shortages of food and potable water quickly became an issue, and daily temperatures reached 90 °F (32 °C). An absence of basic sanitation combined with the omnipresent bacteria-rich floodwaters to create a public health emergency.

  It was not until September 2 that an effective military presence was established in the city and National Guard troops mobilized to distribute food and water. The evacuation of hurricane victims continued, and crews began to rebuild the breached levees. On September 6, local police estimated that there were fewer than 10,000 residents left in New Orleans. As the recovery began, dozens of countries contributed funds and supplies, and Canada and Mexico deployed troops to the Gulf Coast to assist with the cleanup and rebuilding. U.S. Army engineers pumped the last of the floodwaters out of the city on Oct. 11, 2005, some 43 days after Katrina made landfall. Ultimately, the storm caused more than $80 billion in damage, and it reduced the population of New Orleans to a fraction of its former size.
 

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Universalium. 2010.

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