Again the IPCC has apparently fudged statistical data in order to promote the theory of anthropological global warming.
There is no statistical basis for the idea that warming has contributed to the number or intensity of tropical storms. If you remember the 2005 Atlantic hurricane season then you can see where anecdotally this seems plausible. But statistical analysis does not seem to confirm that there are more, or more intense storms.
I have always been skeptical of the global warming enthusiasts, mainly because the dire warnings seemed overwrought. It is becoming more difficult by the day to credit any proponent of "the sky is falling" syndrome.