Explore the critical importance and vulnerability of the world's water towers in this 38-minute press conference from AGU's Fall Meeting 2019. Discover how mountain regions store and supply water through glaciers, lakes, and streams, supporting a quarter of the global population. Learn about the Water Tower Index, climate change impacts on Himalayan glaciers, and potential solutions including CO2 reduction and political cooperation. Gain insights into the Indus Forum, the significance of timing in water supply, and the need for long-term data collection. Understand the importance of capacity building, training the next generation of researchers, and establishing regional organizations to address water tower challenges. Delve into discussions on defining high mountain regions and their role in global water security.