3. Caribbean Warmer seas are believed to be bolstering the power of hurricanes, which rip through the Caribbean regions with increasing frequency and savagery.
Hurricane Katrina swept through New Orleans in 2005, killing 1,600 people and causing an estimated $40 billion of damages, while research published in this summer in the science journal Nature suggests that hurricanes in the Atlantic are more frequent than at any time in the last 1,000 years.