全球灾后损失快速估算（GRADE）报告：2025年斯里兰卡迪特瓦飓风

Report as of December 17, 2025 Disclaimer © 2025 International Bank for Reconstruction and Development / The World Bank1818 H Street NWWashington DC 20433Telephone: 202-473-1000Internet: www.worldbank.org This work is a product of the staff of The World Bank and the Global Facility for Disaster Reduction and Recovery (GFDRR) with externalcontributions. The ndings, analysis and conclusions expressed in this document do not necessarily reect the views of any individualpartner organization of The World Bank, its Board of Directors, or the governments they represent. Although the World Bank and GFDRR make reasonable efforts to ensure all the information presented in this document is correct, itsaccuracy and integrity cannot be guaranteed. Use of any data or information from this document is at the user's own risk and under nocircumstances shall the World Bank, GFDRR or any of its partners be liable for any loss, damage, liability or expense incurred or sufferedwhich is claimed to result from reliance on the data contained in this document. The boundaries, colors, denomination, and otherinformation shown in any map in this work do not imply any judgment on the part of The World Bank concerning the legal status of anyterritory or the endorsement or acceptance of such boundaries. Rights and Permissions The material in this work is subject to copyright. Because The World Bank encourages dissemination of its knowledge, this work maybe reproduced, in whole or in part, for noncommercial purposes as long as full attribution to this work is given. Cover photo: https://commons.wikimedia.org/wiki/File:Ditwah_2025-11-29_0905Z.jpg Global Rapid Post-Disaster DamageEstimation (GRADE) Report Cyclone Ditwah 2025 Sri Lanka Acknowledgments This report was prepared by a team led by Rashmin Gunasekera (World Bank's Disaster ClimateRisk Management, IDURM and the Global Facility for Disaster Reduction and Recovery, GFDRR).The team comprises James Daniell, Harriette Stone, Bramka Jano, Aaron Opdyke, JohannesBrand, Roberth Romero, Annika Maier, Andreas Schaefer, Bastian van den Bout, Judith Claassen,Mikhail Sirenko and Kerri Cox of the GFDRR's Global Program for Disaster Risk Analytics and theWorld Bank's Disaster Resilience Analytics and Solutions (D-RAS) team. The GRADE team would like to thank the Government of Japan for its continued generous supportto the GRADE assessments through GFDRR and its Japan-World Bank program for MainstreamingDisaster Risk Management in Developing Countries. The team gratefully acknowledges the contribution and guidance of peer reviewers: Jian Vun(Senior Disaster Risk Management Specialist, IEAU1) and Natasha Chapplow (Disaster RiskManagement Specialist, ISAU1). The GRADE team is also grateful for the support of Adelaide University (University of Adelaide andUniversity of South Australia), including Tharindi Wekoon, Chamaka Karunanayake, HelaniMahapatunage, Pasindu Karunatilaka and Guna Hewa. The team acknowledges the support, contributions, and guidance of the World Bank's Sri LankaCountry Mangment Unit and the South Asia Disaster Risk Mangment Team. The team gratefully acknowledges the contribution and guidance of Niels Holm-Nielsen(GFDRR/World Bank). Contributions on gender are from Zoe Trohanis, Mirtha Escobar andCarolina de los Angeles Ferrer Rincon (GFDRR/World Bank) World Bank's Map Clearance team. TheWorld Bank acknowledges the Government of Sri Lanka's leadership in completing thisassessment. The assessment beneted from close collaboration with the External ResourcesDepartment, the Treasury, the Disaster Management Centre, and the Department of NationalPlanning, General Treasury, and many local and international organisations as listed in the datasources and throughout the report. Abbreviations CATDATCopernicus EMSCROPGRIDSDLRDMCD-RASDRMERA5ECLACECMWFFAOFYGDPGFDRRGHSLGLOFASGloBFPGOESGoSLGPM-IMERGGPURLGRADEHOTOSMHRSLIBTrACSICTIDFSIFRCIMDIOMNBRONWCOBATOCHAOSMPDCPDNAPMLPROBA-VRAPIDASMAPTEVUCCUNDPUNICEFUNOCHAUNOSATUS$Catastrophe DATACopernicus Emergency Management ServiceGlobal gridded crop distribution/production datasetsDeutsches Zentrum für Luft- und Raumfahrt (German Aerospace Center)Disaster Management CenterDisaster-Resilience Analytics & Solutions, GPURL, World Bank GroupDisaster Risk ManagementECMWF Reanalysis 5th GenerationEconomic Commission for Latin America and the CaribbeanEuropean Centre for Medium-Range Weather ForecastsFood and Agriculture OrganizationFinancial YearGross Domestic ProductGlobal Facility for Disaster Reduction and RecoveryGlobal Human Settlement LayerGlobal Flood Awareness SystemGlobal Building Footprint DatabaseGeostationary Operational Environmental SatelliteGovernment of Sri LankaGlobal Precipitation Measurement – Intg. Multi-satellite Retrievals for GPMUrban, Disaster Risk Management, Resilience and Land Global PracticeGlobal RApid post-disaster Damage EstimationHumanitarian OpenStreetMap TeamHigh-Resolution Settlement LayerInternational Bes