iption TextThe provision of safe and sufficient water sanitation and hygiene WASH services is essential to protecting human health and providing an environment in which people can develop and maintain livelihoods. This is especially true in humanitarian crises during which safe access to these services is frequently disrupted often for long periods of time. Humanitarian crises are growing in length and complexity due to external destabilising forces that include the impacts of climate change and ongoing geopolitical instabilities. As a result traditional emergency programming does not effectively address the needs of modern WASH crises. Humanitarian and development WASH professionals must work together in a more coordinated manner to develop effective humanitarian WASH programming that keeps longterm development goals in mind.The authors discuss lessons learned across Africa Asia and the Middle East that will inspire humanitarian development and other professionals in and outside the WASH sector to improve the longterm impact of sustainable WASH programmes in humanitarian contexts. Case studies and conversations with WASH thinkers and programme designers invite readers to reflect on the WASH humanitarian and development divide and reflect on the future of the WASH sector. This book also reflects on how WASH is more than just water service delivery it is a major contributing factor in facilitating child protection education health and economic recovery. When there is strong intersectoral coordination with a strategic adequate coherent and effective response to a humanitarian crisis with a vision for the transition to development everyone wins.