Many areas of the Southwest US are expected to face water shortages under climate change. At the same time, data centers are being built across this region, which could further put a strain on water availability. Using the city of Phoenix, AZ and the surrounding county (Maricopa county) as an example, we aim to forecast municipal water demand and supply in the near future. Phoenix receives most of its municipal water from the Salt River Project, which manages a system of reservoirs on the Salt river and Verde river. We model inflow into and outflow from these reservoirs as a function of various factors such as temperature, precipitation, population dependent on the reservoir for water, number of farms in the vicinity, number of data centers, etc.