CEMS-Floods (EFAS and GloFAS) datasets are openly available on the Copernicus Climate Change Service (C3S) Climate Data Store (CDS). The CDS provides access through web-based and API-based search and retrieve facilities. It is an easy way for users to access climate-related data, including CEMS-Flood data. Access to the Climate Data Store is available via the web at Copernicus Climate Data Store.
Note that the data service offered by the CDS is not maintained as a time-critical operational service and should not be used for any time-critical operations. If you would like access to real-time forecast data for time-critical operation please contact us at https://cds.climate.copernicus.eu/contact-us.
Inquiries about CDS access for real-time CEMS-Flood forecasts and/or reforecasts should be made through ECMWF Support Portal - the primary entry point for all users for all types of queries on ECMWF data, products, and services.
For further information on the ECMWF Support Portal and how to submit a query related to CEMS-Flood data, visit https://www.ecmwf.int/en/newsletter/169/news/ecmwf-support-portal-all-users-and-queries
Also consider consulting the CDS User Forum for discussions related to the CDS (e.g. infrastructure, datasets, etc).