Following the catastrophic flooding in July 2021, which resulted in extensive damage and loss of life in Rhineland-Palatinate and North Rhine-Westphalia, Germany, the Federal Office of Civil Protection and Disaster Assistance (BBK) activated the Copernicus Emergency Management Service to assess the flood’s impact and aid in future prevention efforts. The project relied heavily on the integration of high-resolution Digital Terrain Models (DTM) and land cover data provided by the Federal Agency for Cartography and Geodesy (BKG). By harmonizing these data sets and removing extraneous features such as vegetation and buildings, the project aimed to reveal the underlying topography and assess its impact on flood behaviour. In addition, the CORINE Land Cover dataset was utilized to identify specific land characteristics that influence flooding. These data were then combined with meteorological data from the German National Meteorological Service (DWD) to create detailed hydraulic models and flood simulations for different rainfall scenarios. The resulting heavy rainfall hazard information maps provide valuable insights into potential flood-prone areas, enabling better preparedness and more informed decision-making in the future.