Heat illness refers to a spectrum of disorders that occur when the body is unable to dissipate heat absorbed from the external environment and the heat generated by internal metabolic processes. As heat illness progresses, failure of one or more body systems can occur. This report summarizes reportable medical events of heat illnesses, heat-related hospitalizations and ambulatory visits among minority active component members (Black, non-Hispanic, Hispanic, and Asian/Pacific Islanders) during 2016.