Hurricane Wilma the Latest Most Powerful Hurricane ever recorded

Hurricane Katrina, at the time it was at sea, was the strongest hurricane on record. Well, Wilma has just passed it up and could hit Florida; the Florida Keys are being evacuated as I type. As I have written about earlier, the trend has been for hurricanes to be, on average, more powerful over the past 3-4 decades. This is what has been expected by global warming models. This may in fact become the norm, rather than the exception or a fluctuation. Time will tell, but should we not start taking the hint that something is most likely up, and if humans are responsible for some part of it shouldn't we try to do something to stop it?