Water is at the heart of human security. It also serves as the vital link to a number ofother human needs such as food, energy, and infrastructure. How water is managedwill have repercussions on almost every aspect of human security. It is common knowledge that our planet is endowed with abundant water resources but the amount of that available in the form of usable water is very small. Over the years, the world’s water resources have been increasingly facing severe pressure from many drivers: population growth, migration, industrialization, urbanization, socioeconomic development, among others. Climate change is exacerbating the crisis, particularly in Asia. Changing weather conditions are leading to increasing hydrologic variability and incidences of extreme events.Melting glaciers will affect water supplies, creating risks of glacial lake outbursts of floods and downstream flooding for some regions. This will lead to an overall reduction in water supplies from snow cover and glacial runoff in the long run. Droughts will also become an even more serious concern.Conference on “Water Security and Climate Change: Challenges and Opportunities in Asia" aimed to encompass as many dimensions of water security as possible and received papers related to sixteen thematic areas. These include:state of water resources and water security philosophies;assessing and quantifying water security;hydrological assessment and forecasting;groundwater security assessment and management;environmental water security assessment;water security for agriculture productivity;climate induced disaster risk assessment and impacts;climate resilient water supply management;enhancing ecosystem protection;climate change adaptation to reduce disaster risk;decision support tools for enhancing water security;water utility management;regional and national levelwater security enhancement interventions;water economics;wastewater reuse;stakeholder engagement and institution building