Although some of the environmental damage, such as the flooding, was relatively short-lived, other damage remains. The human tragedy and economic devastation caused by the hurricane was accompanied by extensive environmental damage. Late in 2007, it was discovered that many of the trailers have problems with the growth of mold and outgassing of formaldehyde.
Federal Emergency Management Agency (FEMA). In 2008, most of these neighborhoods remain essentially unrepaired and the residents have yet to return to the city or move from the mobile trailers that were supplied by the U.S. Neighborhoods were destroyed and residents evacuated. In New Orleans, Louisiana, more than 50 breaks in levees and floodwalls resulted in the flooding of 80% of the city. By comparison, the debris from the collapsed World Trade Center towers was approximately 1.5 million tons. One estimate of the amount of debris-100 million cubic yards-would be enough to cover more than 1,000 football fields with waste to a depth of 50 ft (15 m). The environmental damage created by the storm was enormous. Over 1,800 people died directly due to the hurricane and the subsequent floods. As well, portions of the coast of Alabama, which were up to 100 mi (160 km) away from the storm’s center, were greatly damaged. The coast of Mississippi was devastated by the winds and accompanying storm surge that, in places, traveled up to 6 mi (9 km) inland and over 10 mi (16 km) upstream in streams and rivers. When it again made landfall along the northeastern Gulf coast of the United States, it had become a category 5 hurricane, and was the third-strongest hurricane ever to affect the United States.
It passed over southern Florida and into the Gulf of Mexico, where it strengthened into a category 3 hurricane. Hurricane Katrina formed on August 25, 2005. Hurricanes: Katrina Environmental Impacts Introduction
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