Meeting humanity’s increasing demand for freshwater and protecting ecosystems at the same time, thus maintaining blue water footprints within maximum sustainable levels per catchment, will be one of the most difficult and important challenges of this century (35). Proper water scarcity assessment, at the necessary detail, will facilitate governments, companies, and investors to develop adequate response strategies. Water productivities in crop production will need to be increased by increasing yields and reducing nonproductive evaporation (36, 37). An important part of a strategy to reduce the pressure on limited blue water resources will be to raise productivity in rain-fed agriculture (31). It will be important that governments and companies formulate water footprint benchmarks based on best available technology and practice (38). Assessing the sustainability of the water footprint along the supply chain of products and disclosing relevant information will become increasingly important for investors (39).