The number of disasters occurring in ASEAN Member States, as shown in Figure 1, is increasing. Among them, a significant portion of these disasters are water-related or rain-induced, including storms, floods, landslides and droughts, as shown in Figure 2. The situation is getting worse with more intensive and frequent rainfalls. ASEAN suffers damage in excess of USD4.4 billion each year on average as a consequence of natural hazards (AADMER 2016). During the period of 2004 to 2014, the region contributed to more than 50% of the total global disaster fatalities, or 354,000 of the 700,000 deaths in disasters worldwide (ASEAN Vision 2025 on Disaster Management). With this new normal, there is a need to anticipate and prepare for the unknown, such as unprecedented risks and unanticipated affected areas, magnified by climate change (AADMER 2016).