"The giant storm levelled virtually everything standing along 100 miles of coastline. In all, it killed 1,800 people in seven states, and caused $90bn (£58bn) of damage. It wreaked colossal damage on the region's oil, forestry and tourism industries. More than one million people were left homeless... At its height, four-fifths of New Orleans was under water, to a depth of 20 feet. Today, more than a quarter of the pre-Katrina population of 450,000 have not returned."
Source: Hurricane Katrina: The storm that shamed America, by Rupert Cornwell -