More cyclones than usual forecast for east Asia by Sept Rising air and sea surface temperatures help fuel stronger storms, with the potential for faster wind speeds and heavier rain Published: 7:33 PM, Jun 04, 2021 Residents on a rescue boat are evacuated from their flooded houses following Typhoon Vamco, in Rizal Province, Philippines. - Reuters File Photo SHARE SINGAPORE: Half of the roughly 20 tropical cyclones expected to form in the western Pacific Ocean through September this year are predicted to hit land in east Asian nations, forecasters said on Friday, making for a season that is busier than usual. Tropical cyclones, also known as typhoons and hurricanes, can pack wind speeds ranging from 63 kph to 250 kph, and the accompanying rain and storm surges can devastate coastal regions.