I think anyone within a hurricane landfall target is well advised to take shelter. Having lived in Virginia Beach for most of my formative years, I've witnessed hurricane damage firsthand- but never above Category 2.
May God bless you and everyone impacted by Katrina.
As to Swampwalker's comment, well as horrible as recent hurricanes have been, this is probably part of a naturally recurring cycle. Peak hurricane occurence, categories 3-5, actually cycles every few decades. While terrible, recent events fall within expected models (unfortunately).
Not saying the Earth's not been warming...that's also a recurring cycle that can be traced back thousands of years. Recently, the Earth's been warming since the end of the last "mini-ice age" in the 1800's.
Is it making hurricanes more frequent? Probably not.
Are we making warming more pronounced through our behavior?. Probably so.