This guide presents an overview of the problems that are encountered when a natural disaster overcomes a nation's resources and suggests general criteria that should be applied in choosing relief measures. The information is not technical; it describes a framework within which an administrator can make rational and effective decisions. The information is divided into two sections; the first is a summary of experience with common public health problems after disasters; the second deals with specific health topics and relief procedures. This guide was developed for decision makers and senior administrators in disaster-prone developing countries.