Glaciers of the Himalayas cover an area of about 30,000 km2, one of the largest concentrations of glacier ice outside the polar regions. Changing climate is already having an impact on most of these glaciers, resulting in increased melting, increased glacial lake development, and an increase in the risk and frequency of outburst flooding. Less well understood is the impact that continuing climate change will have on the flow some of Asia’s largest rivers, including the Ganges, Indus, Brahmaputra, and Salween, all originated from glacier sources. This session will examine the changing behavior of Himalayan glaciers and their relationship to the region's hydrology.