Flood disasters are the most frequent and devastating natural disaster in the Asia region, and like disasters in general, their impacts have grown in spite of our improved ability to monitor and describe them (White et al. 2001). For the past thirty years the number of flood disasters has increased compared to other forms of disaster (Dutta & Herath 2005). China and India are the most frequently affected followed by Indonesia, the Philippines, Bangladesh, Iran, Thailand, Sri Lanka, Vietnam and Pakistan.