Yemen is experiencing a politically and economically tumultuous period, with both the public and private sectors having failed to address food, water and energy insecurities facing the country. The goal of this case study is to understand the processes that have led to water scarcity inYemen and, specifically, in its capital, Sana'a. Population vulnerability to water scarcity is being examined and identified, and particular focus is placed on the urban poor and those living in informal settlements within the city's peripheries.