The objective of this Civic Innovation Challenge (CIVIC) project is to support research on developing and piloting 3D digital models of homes for simulating how extreme heat behaves indoors and outdoors. Built out of collaboration with local households, these models look to help identify areas most affected by heat and allow testing of different solutions, such as shading, ventilation, or material upgrades. Extreme heat is one of the deadliest natural hazards in the United States, and its impacts are intensifying due to urban expansion. In neighborhoods like Westside in San Antonio, Texas, many homes -- especially those built before modern energy codes -- lack proper insulation and cooling systems, making them vulnerable during prolonged periods of high temperatures. This project looks to create a shared platform for residents and city partners to explore retrofit options, assess energy use, and make informed decisions about home improvements. By connecting scientific tools with real-world decision-making, it aims to demonstrate how translational research reduces disaster risks and supports long-term planning in housing and infrastructure. It seeks to serve as a model that other neighborhoods can adapt to similar challenges. This pilot project implements and evaluates co-creation of digital twins for enrolled homes in San Antonio’s Westside neighborhood. Digital twins are 3D, data-enriched models created using low-cost LiDAR sensors via smartphones and validated with prof