This book addresses two common problems encountered by emergency services personnel: the design and implementation of evacuation warning systems to ensure citizen compliance with the directives of authorities and the permanent relocation of families threatened by hazards. The authors pay particular attention to the problems of constructing warning messages; to the citizen's interpretation of message content; the techniques of delivering warning messages; and the management of citizen movements out of threatened areas. Administrative issues related to variations in compliance among ethnic groups are also noted. In the second section, the authors explore the social psychological impact and the logistical, administrative, public policy, and political aspects of relocation. They elaborate a series of principles of positive relocation general enough to apply to a variety of relocation situations.