To inform Clark County residents and visitors about the impact of heat-associated illness and mortality, the Southern Nevada Health District has developed this report presenting data on heat-associated deaths and emergency department visits for 2024. The Centers for Disease Control and Prevention (CDC) define extreme heat as reaching higher than average temperatures or humidity levels for a particular location and time of year. Heat-related illness occurs when a person’s body temperature rises faster than it can cool down, which may lead to heat exhaustion or heat stroke, ultimately damaging the brain or other vital organs. Older adults, young children, and individuals with mental illness or chronic health conditions are at the highest risk for heat-related illnesses.