[Construction of a new type of urban high-temperature resilience infrastructure with "blue-green-grey-smart" synergy:...

The coupling of global warming and accelerated urbanization has led to frequent and severe extreme heat events, threatening urban ecological stability, public health, and sustainable development. Actively responding to the risks of high temperatures and enhancing the heat resilience of cities are urgent needs to ensure urban safety and high-quality development. Infrastructure is a key carrier of the adaptive capacity and ecological service functions of urban and rural systems, as well as an important approach to address climate risks through infrastructure innovation and implement the resilient city strategy. Grasping the core direction of the national infrastructure system reform, we constructed a new infrastructure system for urban heat resilience by taking information networks as the foundation, technological integration and innovation as the key, and digitalization as the framework, with the goal of empowering "blue-green-gray" infrastructure to undergo smart and ecological transformation in response to high-temperature risks. We defined the theoretical and methodological connotations of the construction of new infrastructure for heat resilience, proposed a "blue-green-gray-smart" collaborative framework, analyzed the implementation challenges, such as insufficient coordination of green infrastructure, weak support of blue infrastructure, lagging transformation of gray infrastructure, and insufficient empowerment of smart infrastructure. We further delved into the four root causes of functional protection, survival support, carrier support, and quality improvement and efficiency enhancement, and proposed an implementation path for the construction of new infrastructure for heat resilience based on a collaborative adaptation system, a people-oriented governance system, and a full-chain guarantee mechanism. This study would provide core support for the implementation of smart infrastructure and the construction of heat-resilient cities, and could offer theoretical and practical references for urban high-temperature risk response and ecological resilience enhancement.