The July 2021 floods across Belgium, Germany, Luxemburg and the Netherlands were unprecedented in the combination of timing and magnitude as well as in casualties and damages. 

This report presents an assessment of the performance and quality of the service provided by the European Flood Awareness System (EFAS) of the Copernicus Emergency Management Service (CEMS). 

During the event, EFAS issued 25 notifications. This detailed assessment report highlighted an overall good performance of the system. Nevertheless, the in-depth investigation of each notification and of the EFAS forecasts and simulations allowed to streamline a number of actions to further improve the service. 

The report is available from Reports | Copernicus EMS - European Flood Awareness System (efas.eu)

This publication is the outcome of the collaboration between EC JRC and the CEMS Hydrological Forecast Centre - Analytics and Dissemination, the CEMS Hydrological Forecast Centre - Computations, the CEMS Meteorological Data Collection Centre, and the CEMS Hydrological Data Collection Centre.