The dataset contains 2021 data on cities' climate hazards, reported by cities through the CDP-ICLEI Unified Reporting System in response to question 2.1 (" Please list the most significant climate hazards faced by your city and indicate the probability and consequence of these hazards, as well as the expected future change in frequency and intensity.") in the 2021 Cities questionnaire. View cities questionnaire guidance at https://www.cdp.net/en/guidance/guidance-for-cities. Please contact cities@cdp.net if you have any questions. This data is collected through the CDP-ICLEI Unified Reporting System. When using this data, please cite both organisations using the following wording: ‘This data was collected in partnership by CDP and ICLEI - Local Governments for Sustainability’. For further guidance on how to reference this data for use in external publications, please refer to the Open Data Portal Terms of Use available on the homepage.