Since proper records of hurricanes began, only five Atlantic hurricanes have been recorded as being at category 5 at landfall.
Two have come in the past fortnight - Hurrican Dean and Hurricane Felix. Really not good news for Central America - given the problems with deforestation, the amount of water that Felix is going to drop is going to result in some pretty horrendous scenes in places.
I'd rather hope that two Cat 5s landing in a year, let alone a fortnight, is an improbably blip. However, I do expect some in the global warming scare lobby will throw this at the refuseniks in retaliation for their claiming 2006 meant warming was a myth. In the meantime, the scientists will try to work out what is going on.