"This guide is for people in a state, city, county, or town who come together during times of emergency, make the tough decisions about how to manage the crisis, and put their boots on the ground to save lives and protect the health and safety of area residents. We attempt to provide insight into what roles, resources, and tools the public health sector can bring to the emergency response table at local, state, and federal levels. Although you may notice that many examples are focused on terrorism-related public health emergencies, the information is relevant to all kinds of public health emergencies, including natural disasters."
United States. Dept. of Health and Human Services: Disasters and Emergencies: http://www.hhs.gov/disasters/