If twenty-first century warming occurs as projected, the maximum wind speed of tropical cyclones will likely, on average worldwide, increase 2 to 11 per cent, while rainfall rates will increase approximately 20 per cent within 100 kilometres of a storm centre, according to the WMO Expert Team on Climate Change Impacts on Tropical Cyclones.

http://www.wmo.int/pages/mediacentre/news/index_en.html#tc