On the other hand, hurricane Katrina was the costliest natural disaster in the history of the United States. The storm deeply effected to the U.S. economy in general and the New Orleans economy in particular. In fact, thousands of local residents were left unemployment. According to ABC news, it is estimated that over 70,000 jobs had lost until July 2007. Besides, Katrina damaged almost 30 oil platforms and caused the closure of nine refineries. It also affected to the forestry industry by flooding and destroying over 1.3 million acres of forest lands. And, approximately 600,000 people in New Orleans who worked in non-farm industry were affected by the hurricane. Accounting all those above together with the damages of the potential interruption of oil supply, destruction of highway infrastructure and decreasing in export, Katrina hurricane might cost over 150 billion US dollar.
As a result, Katrina redistributed over one million people from the central Gulf coast, which became the largest diaspora in the history of the United States. Houston, Texas had an increase of