Considering the particular challenges of India, water security is a critical issue with far reaching strategic and global repercussions. Its impact extends beyond sustainability, economics, geopolitics, and climate resilience. While aiming for sustainable development is of great importance, it must be realised that India’s water crisis and security issues extend beyond national boundaries. This research unveils the cascades of probable disruptions emanating from diverse domains, pressing for the need of urgent action. This in-depth research acknowledges the strategic and global relevance of the water security issue that India is currently facing. During the introduction segment, which serves to set the setting, an overview of water security and its importance in light of pressing global challenges is offered. Following that, we will examine the findings of the study about the economic and geopolitical repercussions that are associated with the water deficit in India. Following this, the authors investigate the ways in which climate change affects India’s water supply and provide adaptation solutions that place an emphasis on international cooperation in light of the threat that climate change poses to water security. A condensed overview of the main conclusions is provided, with the purpose of stressing the strategic importance of water security for India’s sustainable future. At its conclusion, it makes an appeal to various stakeholders, academics, and lawmakers to work together in order to find solutions to water-related issues. This is done in order to ensure that India is able to achieve growth that is both resilient and water-sustainable.