On June 18, 2025, the Center for Climate & Health and Metropolitan Area Planning Council (MAPC) hosted a symposium: “Fostering Collaborations: A Symposium to Advance Equitable Heat Health Actions” to bring together regional stakeholders including state and municipal governments, academics, healthcare institutions, community-based organizations, foundations, and advocacy groups in the Greater Boston region to foster a constructive dialogue with the focus on bridging the gap between heat health research and practice. Materials from the event, including lightning talk slides and posters are available now. This critical work was made possible by the Hariri Institute for Computing, Boston University for hosting, and the Doris Duke Foundation for sponsoring this project.