When's the last time that there were 2 Category 5 hurricanes in a hurricane season? 2 that entered the Gulf? This year has been absolutely historical.
Don't know the time it last happened in recorded history, but I do know that yesterday, I heard that historically speaking, the gulf only gets one cat 3 landfall hurricane every 9 years. Tons of 1's and 2's, but Katrina and Rita has got to be the biggest one/two punch to the gulf in modern memory.
I can't think of any, but see if you can find some:
http://weather.unisys.com/hurricane/atlantic/
Probably back in the 40s. This kind of season is not unprecedented, no matter what the greens and the rats and the leninists try to spin and sell.