Increasing extreme heat poses challenges to metropolitan areas, such as those areas already experiencing extreme heat in Arizona. Using the US Centers for Disease Control and Prevention (CDC)’s Building Resilience Against Climate Effects (BRACE) Framework, state and local health departments have looked to expand cooling center networks as one option to build heat resilience. We present a method to pick new locations for cooling centers based on demand and current coverage. Using two locations in Arizona, we highlight differences in workflows and how the resulting information can be incorporated into separate but parallel efforts to reduce heat impacts. We used the Network Analyst Location-Allocation tool in ArcGIS Pro to maximize coverage of cooling centers in each area, so that additional cooling centers are selected to reflect local needs. The input data and parameters of the workflow were co-produced with input from two county health departments and a cooling center working group to better address the unique challenges related to cooling center access. To facilitate the application of this approach to other regions seeking to address heat health inequities, we provide a detailed protocol and a discussion of alternative selections.