Holistic Assistance Response Teams (HART) is a Harris County program created to dispatch 911 directly and other calls to interdisciplinary unarmed, first responder teams, trained in behavioral health and on-scene medical assistance. The HART program aims to improve community health and safety by quickly providing the appropriate response to community members experiencing homelessness, behavioral health issues, or non-emergency health or social welfare concerns, and to reduce unnecessary law enforcement or hospital-based interventions for non-emergent 911 calls.

HART launched on March 21, 2022, and as of September 2025, the HART Model operates in all HCSO districts. HART provides coverage 7 days a week from 7 A.M. - 11 P.M. Since its launch, HART has responded to more than 25,000 calls through the end of 2025.