Integrated Urban hydrometeorological, climate and environmental Services (IUS) is a World Meteorological Organization (WMO) initiative to aid development of science-based services to support safe, healthy, resilient and climate friendly cities. Guidance for Integrated Urban Hydrometeorological, Climate and Environmental Services (Volume I) has been developed with the intent to provide an overview of the concept, methods and good practices for producing and providing these services to respond to urban hazards across a range of time scales (weather to climate). This involves combining (dense) heterogeneous observation networks, high-resolution forecasts, multi-hazard early warning systems and climate services to assist cities in setting and implementing mitigation and adaptation strategies for the management and building of resilient and sustainable cities. IUS includes research, evaluation and delivery with a wide participation from city governments, national hydrometeorological services, international organizations, universities, research institutions and private sector stakeholders. An overview of the IUS concept with key messages, examples of good practice and recommendations are provided. The research community will play an important role to: identify critical research challenges; develop impact forecasts and warnings; promote and deliver IUS internationally, and; support national and local communities in the implementation of IUS thereby contributing to the United Nations' Sustainable Development Goals at all scales.

综合城市水文气象、气候和环境服务(IUS) 是世界气象组织 (WMO) 的一项举措，旨在帮助开发基于科学的服务，以支持安全、健康、有弹性和气候友好型城市。制定城市水文气象、气候和环境综合服务指南（第一卷）的目的是概述生产和提供这些服务以应对不同时间尺度的城市灾害的概念、方法和良好实践（天气到气候）。这涉及结合（密集）异质观测网络、高分辨率预报、多灾种早期预警系统和气候服务，以协助城市制定和实施缓解和适应战略，以管理和建设有复原力和可持续的城市。IUS 包括研究、评估和交付，得到市政府、国家水文气象部门、国际组织、大学、研究机构和私营部门利益相关者的广泛参与。提供了 IUS 概念的概述以及关键信息、良好实践示例和建议。研究界将在以下方面发挥重要作用： 确定关键的研究挑战；制定影响预测和预警；在国际上推广和实施 IUS；支持国家和地方社区实施 IUS，从而为联合国各个层面的可持续发展目标做出贡献。