Natural Disaster's can stimulate neighbouring economies.

Nadine is right in her observation that natural disaster's adversly effect the local area in which they occur, but natural disaster's can actually promote the economies of countries that provide relief as many government contracts are then passed to civilian agencies. Also, donations from private citizens to non-profit's are then usually used to pay for contracts non-profits have with companies. The US government alone has awarded over 15 million dollars in contracts, in the wake of the earthquake in Haiti, and after looking at a list of recipients almost all of them are US based corporations. This information can be found at https://www.fpds.gov/fpdsng_cms/ . Also US based private security contractor's will stand to make a lot of money, companies such as Triple Canopy, and Xe (Formally Blackwater), are already bidding for work in the Carribean region. This is directly related to the fact that after Hurricane Katrina, Blackwater alone had 150 men on the ground first day, making natural disaster's a very profitable industry for the private defense sector. Some interesting articles i have come across on the subject are:

http://www.govexec.com/story_page.cfm?articleid=44466&dcn=e_tma
http://www.propublica.org/article/u.s.-private-security-firms-head-to-haiti-121