Flash floods are the most dangerous type of flood, killing more than 5,000 people each year. WMO's Flash Flood Guidance System is a forecaster’s tool designed to provide precipitation estimates to produce accurate early warnings, allowing for rapid mobilization of response agencies. WMO, in partnership with the U.S. Agency for International Development/Office of the U.S. Foreign Disaster Assistance (USAID/OFDA), the National Weather Service (U.S. NWS) of the U.S. National Oceanic and Atmospheric