As you warm the climate, you basically raise the speed limit on hurricanes
Hurricanes have killed more people worldwide in the last 50 years than any other natural cataclysm.
The hurricanes are following the tropical ocean temperature. The tropical ocean temperature is following the Northern Hemisphere. And it's very hard now to believe that there's anything natural about that.
The temperature of the tropic oceans is warmer than it's been in 150 years
It is tempting to ascribe Katrina, Rita and now Wilma to global warming effects, but I am not sure that would pass statistical muster.