Floods are among the most frequent and deadly natural phenomena, affecting an average of 520 million years. The situation in the Hindu Kush Himalayan region is even worse due to its population, economic status, development in the hazard-prone areas, and impact of climate change. It is evident that floods cannot be controlled, and efforts should be directed towards reducing vulnerability by providing end-to-end Flood Forecasting and Early Warning Services. The SERVIR HKH program a joint initiative of NASA, USAID, and ICIMOD has developed several flood forecasting tools for Bangladesh and Nepal. By adopting the Service Planning Approach (SPA), SERVIR-HKH can focus on users and their capacity-building needs. SPA ensures that relevant stakeholders from government, private sectors, and communities are consulted to identify their needs and capacity and to co-develop the decision-making tools. This help to foster collaboration among the stakeholders and ensure inclusivity and ownership of the tool once the project is completed. The SERVIR-HKH service includes an operational 10-day Streamflow Prediction Tool (SPT) and 54 h of short-term Flash Flood Prediction Tool (FFPT). The SPT is designed for larger rivers whereas the FFPT is for smaller rivers. A customized user-friendly web-based portal has been developed to communicate forecasts to the intended users. Additionally, a web-based near real-time flood inundation tool is also operational that aids in mapping vulnerable and high-risk areas. Working with and building the capacity of government agencies, INGOs, and end-users has led to the adaptation of the tools for decision-making in Bangladesh and Nepal.