The app “Flood DangerST” serves to inform the population about the risk of flooding in the state of Saxony-Anhalt. It also provides information on flood protection and what to do in the event of flooding. Since the app serves to provide citizen information, it is free. The “Flood DangerST” app visualizes the flood risk maps of the state of Saxony-Anhalt in the map area. The classified water depths of areas that are flooded during a flood event are shown. The representation can be selected for 3