The Rapid Environmental Impact Assessment in Disaster (REA) is a tool to identify, define, and prioritize potential environmental impacts in disaster situations. A simple, consensus-based qualitative assessment process, involving narratives and rating tables, is used to identify and rank environmental issues and follow-up actions during a disaster. REA development is a Benfield Hazard Research Centre-CARE International collaborative effort, with financial assistance of the joint UNEP/OCHA office in Geneva, Royal Norwegian Ministry of Foreign Affairs, Office of Foreign Disaster Assistance, USAID and CARE International. A French version is also available.