This document provides an overview of trauma and trauma-informed care. It defines trauma as experiences that overwhelm an individual's ability to cope, such as abuse, violence, loss or disasters. Trauma has widespread impacts on physical, emotional and cognitive functioning. High rates of trauma are seen in populations experiencing homelessness, addiction and mental illness. The core principles of trauma-informed care emphasize safety, trust, choice and empowerment. Trauma-informed practices view behaviors as adaptations to past trauma and focus on building safety and resilience. Implementing trauma-informed care requires organizational changes and self-care to prevent burnout among providers from secondary traumatic stress.