The proposed GCF Project, estimated at USD 50 million, will mainstream climate change and variability considerations into the Freetown WASH and Aquatic Environment Revamping Program. Climate variability and change pose significant challenges to the availability and quality of Sierra Leone’s extensive water resources, which comprise surface waters connected through a network of river basins (USAID 2016). Seasonal variations in river flows are significant: an estimated 40% of the country’s protected water points suffer water shortages in the dry season. Increased forest degradation coupled with increase in intensity of rainfall events increases runoff and sediment loads in the rivers, affecting water quality in the water courses in Freetown. Sea level rise also pauses additional constraints to the sustainability of the fresh water systems to salinity and floods. The proposed interventions which include: (i) Climate Resilient Catchment Based Water Resources Management and (ii) Climate Resilient Forest Management, will enable resource management and sustainable access to safely managed water supply and improved sanitation for at least 1,000,000 residents of greater Freetown, including enhancing opportunities for prosperity for about 600,000 people living among communities that are vulnerable to climate shocks. The interventions will also contribute towards emission reductions estimated at 22.5 tCO2eq. The prioritized activities will contribute towards the transition to a low-carbon and climate-resilient economy in line with Sierra Leone’s NDC commitments. The executing agency will be the Guma Valley Water Company while the Ministry of Water Resources will coordinate the participation of all relevant agencies.