How many Hurricane Katrinas does it take to make this point? (realclimate.org)
«You can't say that Katrina was caused by global warming, but you can say global warming will cause more Katrinas.» (heatisonline.org)
For the first time (after Katrina and the Emanuel / Webster papers), the public sensed that one degree warming could potentially have some serious consequences, if one degree would make future Katrinas more likely. (realclimate.org)