Floods are far and away the most common natural disaster worldwide and account for the most deaths. The deadliest disaster of the 20th century was the China floods of 1931, which by many accounts resulted in more than a million deaths.
In the United States, floods account for more deaths than any other natural disaster; resulting in more loss of life and property than other types of hazards and severe weather events. This is due to the multifaceted nature of flood events. For instance, the US Eastern and Gulf coasts are particularly vulnerable to storm surges from hurricanes, while the Northeast and North Central U.S., and some areas of the Western U.S. are more susceptible to excessive rainfall, snow/ice melt, and dam failures. In Alaska the Upper Midwest and other areas, river ice jams can also cause severe flooding.
The NASA Disasters Mapping Portal is a web platform that provides access to near real-time and value added data products in geographic information system (GIS) format, through web applications, map layers, and API's. The Mapping Portal provides NASA data in a beneficial format for emergency managers and GIS specialists within local, state, federal and international disaster response agencies. The Flood Dashboard shown above brings together multiple soil moisture and flood products from NASA, the National Weather Service and USGS to give a more complete picture of potential flooding in the United States.
Flood Risk, Resilience and Response
Recent studies have highlighted how local investments in simple flood preparations often experience 70% less property damage when flooding occurred. But achieving such benefits on a global scale requires full understanding and characterizations of flood exposure. NASA’s Disasters Response Program, combined with its fleet of Earth Observing satellites, is helping scientists and decision-makers improve prediction of, preparation for, response to, and recovery from flood disasters.
Our Agency’s flood preparedness and response capabilities include satellite observations, data systems, and modeling capabilities divided into two core areas:
- Global Flood Prediction and Warning (weather prediction coupled with increasingly accurate satellite observations and hydrological models):
- Global Flood Mapping and Damage Assessment (from the observed satellite time series record of flood events, and also from modeling):