Flood estimates are critical for a variety of applications, including hazard mapping, hydraulic engineering, and critical infrastructure safety assessments. They are essential for preventing human and economic damage and designing safe and cost-effective hydraulic structures. However, several challenges complicate flood estimation, primarily due to the relatively short duration of discharge observations at a site of interest or, in many cases, the complete lack of discharge data for direct extrapolation. The “Extreme Floods Switzerland” (EXCH) project has addressed these challenges and provided hydrometeorological baselines for catchments throughout hydrological Switzerland. The flood estimates obtained within the framework of EXCH are of great value for a wide range of return periods, ranging from floods with return periods in the range of 10 to several hundred years to extremely rare and extreme floods with return periods in the order of 1,000 to 10,000 years. The scope of the proposed EXCH+ project is to further contextualize and valorize the results of EXCH and to develop relevant approaches for further investigation of the EXCH simulation data, in particular (but not exclusively) for flood protection and the assessment of dam safety.