 Flooding has been a major concern in recent decades due to rapid development in river catchment areas that has led to increased surface and river runoffs, increased sediment buildup in rivers, and a higher risk of overflowing rivers.The 2006 and 2007 floods in Johor has resulted in loss of RM1.5 billion and 18 lives in addition to the temporary displacement of 110,000 people.Due to weak Coriolis forces from its close proximity to the equator, tropical cyclones are extremely rare for the country despite its proximity to the highly active Northwestern Pacific tropical cyclone basin; the only tropical cyclone to significantly affect Malaysia since records began was Tropical Storm Vamei in 2001.