Dial 9-1-1 for police, fire and ambulance. Community Service Agencies Emergency Medical Services (EMS) - regulates and coordinates the activities of multiple pre-hospital emergency medical care providers. Hazardous Materials Emergency Response Service - responds to hazardous materials incidents related to fires, spills, container or equipment leaks, container abandonment and any hazardous materials situation that threatens public health and safety or the environment. Legal Aid Society of San Mateo County Safely Surrendered Baby Information San Mateo County Emergency Services Links Tips for Coping with Traumatic Events Pocket Guide to Emergency Preparedness