The National Integrated Heat Health Information System (NIHHIS) Heat Health and Social Vulnerability tool will be demonstrated as part of the American Public Health Association (APHA) Town Hall in Philadelphia, PA on 3 November 2019. At the event, this NIHHIS application, which was developed in partnership with Esri, CDC, and NOAA, will be used as part of a scenario-based demonstration allowing attendees to learn how to apply downscaled climate projections and census-tract level social vulnerability information to understand where at-risk populations may reside, and specifically what risk factors can be targeted with interventions.