 Climate change is expected to have significant effects on the hydrology of the Ganges Brahmaputra river basin, including changes in both low and high river flow. This study used a novel method of discharge-weighted ensemble modeling to reconstruct observed discharge based on model outputs from 12 different global climate models. The analysis showed that extreme low flow conditions are likely to become less frequent in the future, while a very strong increase in peak flows is predicted, which could lead to catastrophic flooding if combined with rising sea levels. These findings suggest that the Ganges Brahmaputra river basin is highly vulnerable to climate change, and further research is needed to better understand its implications. This article was authored by A.K. Gain, W.W. Imerzil, F.C. Spernawiland, and others.