This is a synthesis of the presentations and discussions pertaining to Needs Assessments of the Conference, Health Aspects of the Tsunami Disaster in Asia, convened by the World Health Organization (WHO), in Phuket, Thailand, 04-06 May 2005. The topics discussed included: (1) Needs assessments; (2) Coordination; (3) Effectiveness of needs assessments; (4) Needs assessments change; (5) Qualifications for conducting needs assessments; (6) Dissemination; (7) Emergencies overlay background needs assessments; (8) Need for standards; and (9) Conclusions and recommendations.