Access to clean and affordable drinking water, a safe toilet, and the materials and facilities to practice hygiene is a fundamental human right. Yet, millions of people on the planet and thousands of communities, even in some of the wealthiest cities, are denied these rights. The challenge for ensuring access to affordable, high-quality and safe water, sanitation and hygiene (WASH) is frequently a political, not technologic or economic issue. Complicating matters is that urban climate change, accompanied by rising economic, social, and health inequities, has increased the urgency to deliver WASH especially to the urban poor and those already experiencing spatial, social and related vulnerabilities. The 2022 Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment, noted that urban residents, particularly those living in informal settlements, face increased health, economic, and social risks from climate change induced floods and weather events, largely due to the lack of WASH infrastructure (IPCC, 2022). Access to WASH in cities, particularly for the urban poor, is a climate justice issue, and should be a concern for everyone since the potential disease and displacement impacts will not be spatially limited (Dodman et al., 2019;World Bank, 2021). Cities are characterized by physical and social change, including migration, but urban planning has not kept-up with these changes by providing for permanent supplies of safe water and hygienic sanitation for all residents (Calderón-Villarreal et al., 2022). The social reach of inadequate WASH is more than an urban concern, since the issue touches almost all aspects of life, from livelihoods and food security to school attendance to infectious and chronic illness to human security and dignity (WHO, 2019a).The corona virus pandemic has again highlighted that the urban poor and those facing chronic discrimination are most vulnerable to severe consequences when they lack WASH. The COVID-19 crisis highlighted how basic infrastructure is a key component of health equity (World Health Organization WHO, 2021). Health equity, as defined by the World Health Organization, is "the absence of avoidable, unfair or remediable differences among groups of people due to their social, economic, demographic or geographic circumstances" and includes coordinated government, community, and private sector efforts to ensure that all groups and places have the resources and capabilities to make healthy decisions, avoid dangerous environmental and social conditions and live a safe and fulfilling life (WHO, 2022