Levels Published online current water levels German rivers every day. The free Web app warns of high water on rivers like the Elbe, Danube and Rhine. The site level Online is operated by the Office of Waterways and Shipping Administration of the Federation. The information service is at high tide official warnings and displays the water levels of all major rivers in Germany. Level online visualizes the water levels of the Elbe, Rhine, Danube, Saale, Weser, Aller, Saar and many other rivers in diagrams. On an interactive map of Germany one sees marks the current level by color code. Furthermore, the tool sets the current water level in relation to historical water levels at high or low tide. With level online users monitor the water levels of major rivers on the Web. In flood-risk Web App provides information to official warnings. For flood victims also tools such as flood portal, precipitation radar and the Firefox extension should be water levels German rivers of interest.