The Himalayas, often referred to as the "Water Tower of Asia," are undergoing rapid transformations under the influence of climate change. This book brings together interdisciplinary perspectives to examine the complex interactions between climate variability, water resources, and natural hazards across the Himalayan region. The book highlights emerging challenges such as glacial retreat, glacial lake outburst floods (GLOFs), changing hydrological regimes, and increasing frequency of extreme events. It also explores the socio-economic implications for vulnerable mountain communities and downstream populations. Through a combination of case studies, geospatial analyses, and policy-oriented discussions, the volume provides critical insights into risk assessment, adaptation strategies, and sustainable resource management. By integrating scientific research with local knowledge systems, the volume offers pathways toward resilience and informed decision-making in one of the world&s most fragile mountain ecosystems. This book is an essential resource for researchers, practitioners, policymakers, and students working in climate science, hydrology, geography, and disaster risk reduction.