Mental Health Services in Disasters: Manual for Humanitarian Workers, is composed of a noteworthy summary of the most updated knowledge in this field, in a world in which the effects from natural disasters are increasingly more dramatic - be they hurricanes, earthquakes, volcanoes, or floods, etc. Crucial aspects in the management of different disaster victims are emphasized, with special attention to those most vulnerable: the children, the aged, HIV patients, individuals with substance abuse problems and their interaction with other victims.The manual is written in a simple and easy-to-read format for those persons who, in some way, are involved in providing relief to an effected population, as well as in the short and long-term psychosocial and psychophysiological repercussions from the disaster. It's main objective is to provide an orderly, immediate and efficient flow of relief, training public mental health elements and preventing already-identified adverse consequences.Mental Health Services in Disasters: Manual for Humanitarian Workers is an instrument that will contribute to the greatest degree in decreasing the social and psychological consequences for all of those people affected by a disaster. Furthermore, it is complemented by the Instructor's Guide (published in the same collection) that serves to help those individuals who must create and execute training and orientation programs on mental health in disasters.