 Global climate change may exacerbate the situation with extreme weather events in Southeast Asia raising the economic, political and social risks for Malaysia.With 189 water basins and an average rainfall of over 2000-4000 mm per year, Malaysia is prone to riverine, muddy floods that range from hours-long flash floods, to prolonged flooding on flat, low-lying land along major tributaries and main stems.There have been 15 instances of major flooding in Malaysia since 1926.