The Philippines' National Capital Region (NCR) is one of the largest metropolitan areas in the world in terms of population. It is the seat of the Philippine national government and accounts for a third (31.5 percent) of the country's annual gross domestic revenues. Unfortunately, the National Captial Region (NCR) is highly vulnerable to flooding and earthquakes, given its low-lying coastal location and the presence of the West Valley Fault System, which cuts across the entire region, from North to South.