This application displays hydrologic data from the Dartmouth Flood Observatory (DFO). Visualization is divided in regions including: Africa, Asia, Australia, Europe, North America, and South America. Each region contains layers that display different water extent periods. Extreme events on record can be displayed by selecting the "All Events" or the "Nearest Events" layer and providing a search radius and a point on the map. Extreme events can also be filtered by year. A list of suggested layers allows the user to load useful weather layers to provide context. Similarly, users can load any public layer by providing a URL path to the host server containing the layer.