Book excerpt: Hidden Impact: What You Need to Know for the Next Disaster guides primary care clinicians in preparing and responding effectively to future disasters based on current knowledge from the growing field of disaster mental health. Written by nine expert disaster psychiatrists, this handbook is organized into three major sections: Preparation, Assessment and Interventions. The first section, Preparation, covers the disaster response system, self-care, and getting involved. The second section, Assessment, provides assessment scales for screening for mental health issues, suicidality, issues in children and families, special populations, and bereavement. The third section, Interventions aims to provide therapeutic guidance through psychological first aid, psychosocial interventions, psychopharmacology, collaborative care, and international perspectives.