Hurricane Katrina | EPFL Graph Search

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Hurricane Katrina was a devastating that resulted in 1,836 fatalities and caused damage estimated between

97.4 billion to

145.5 billion in late August 2005, particularly in the city of New Orleans and its surrounding areas. At the time, it was the costliest tropical cyclone on record, tied now with Hurricane Harvey of 2017. Katrina was the twelfth tropical cyclone, the fifth hurricane, and the third major hurricane of the 2005 Atlantic hurricane season. It was also the fourth-most intense Atlantic hurricane on record that made landfall in the contiguous United States by barometric pressure. Katrina originated on August 23, 2005, as a result of the merger of a tropical wave and the remnants of Tropical Depression Ten. Early the following day, the depression intensified into a tropical storm and headed generally westward toward Florida. On August 25, two hours before making landfall at Hallandale Beach, it strengthened into a hurricane. After briefly weakening to tropical storm strength over southern Florida, Katrina entered the Gulf of Mexico on August 26 and rapidly intensified. The storm strengthened into a hurricane over the warm waters of the Gulf of Mexico before weakening to a high-end Category 3 hurricane at its second landfall on August 29 over southeast Louisiana and Mississippi. The majority of the loss of lives in Hurricane Katrina was due to flooding caused by fatal engineering flaws in the flood protection system, specifically the levee, around the city of New Orleans. Eventually, 80% of the city, as well as large areas in neighboring parishes, were flooded for weeks. The flooding also destroyed most of New Orleans's transportation and communication facilities, leaving tens of thousands of people who did not evacuate the city prior to landfall with little access to food, shelter, and other basic necessities. The disaster in New Orleans prompted a massive national and international response effort, including federal, local, and private rescue operations to evacuate those displaced from the city in the following weeks.

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