The article discusses a method called multivariate regional frequency analysis, which helps estimate risks of extreme hydrological events at locations without data. By combining regional and multivariate aspects, this approach is more realistic for understanding hydrological phenomena. The researchers introduce the basics of regional hydrological frequency analysis and explain how to estimate risks at ungauged sites. The main components of this method are delineation and regional estimation. Overall, multivariate regional frequency analysis is a useful tool for predicting hydrological risks in different locations.