Taiwan averages 3.5 typhoons annually and many times that in torrential rains. Typhoons and torrential rains cause the most severe of Taiwan's natural disasters. Torrential rain and adverse natural conditions such as steep riverbeds are the main reasons for flooding. Typhoons occurring between June and October contribute to Taiwan’s annual rainfall the most. When rain is concentrated too densely within certain time or space, it tends to cause flooding on a large scale. Furthermore, due ...more