The World Health Organization’s (WHO) page on preparing safe hospitals and health facilities during and after emergencies has many good resources, including the Hospital Emergency Response Checklist, at https://www.who.int/hac/techguidance/preparedness/health_facilities/en/
Hospital Evacuation Toolkit (2014 edition) of the Massachusetts Department of Public Health (MDPH) Hospital Evacuation Toolkit, developed by the Harvard School of Public Health, https://www.mass.gov/files/documents/2016/07/qg/intro_0.pdf
American College of Emergency Physicians, includes current resources on hospital evacuation, shelter-in-place, patient surge, also includes the Hospital Disaster Preparedness Self-Assessment Tool, and resources on EMS and disaster preparedness https://www.acep.org/disaster/
The Hospital Incident Command System (HICS) outlines the hospital's strategy for responding to and recovering from a realized threat or hazard or other incident, https://emsa.ca.gov/disaster-medical-services-division-hospital-incident-command-system-resources/
Healthcare COOP and Recovery Planning: Concepts, Principles, Templates and Resources, published by the U.S. Dept. of Health and Human Services, Office of Assistant Secretary for Preparedness and response, 2015, http://www.phe.gov/Preparedness/planning/hpp/reports/Documents/hc-coop2-recovery.pdf