The Heat Emergencies: Prevention, Diagnosis, and Management Harvard CME Course, now in its second year, is a virtual, lecture-based 4 half-day course beginning June 15th, 2026, through Harvard Medical School to educate clinicians about how to diagnose, treat, and prevent heat-related illness. The course will describe the current evidence around all heat-related emergencies, including heat stroke, heat exhaustion, and heat syncope, as well as provide a background on the changing epidemiology of heat-related illness, varying definitions of heat, basics of thermal physiology, and individual and population-based approaches to prevention of heat-related illness.