Spatiotemporal assessment of extreme heat risk for high-density cities: A case study of Hong Kong from 2006 to 2016



Hua, Junyi, Zhang, Xuyi, Ren, Chao, Shi, Yuan ORCID: 0000-0003-4011-8735 and Lee, Tsz-Cheung
(2021) Spatiotemporal assessment of extreme heat risk for high-density cities: A case study of Hong Kong from 2006 to 2016. SUSTAINABLE CITIES AND SOCIETY, 64. p. 102507.

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Abstract

High-density cities are faced with growing extreme hot weather driven by climate change and local urbanization, but localized heat risk detection is still at an early stage for most cities (Watts et al., 2019). This study developed a spatiotemporal hazard-exposure-vulnerability assessment of the extreme heat risk in Hong Kong for 2006, 2011, and 2016 integrating cumulative very hot day hours and hot night hours in summer, population density and a principal component analysis (PCA) of demo-socioeconomic characteristics. The risk was found spatially variant, and high-risk spots were identified at the community scale for both daytime and nighttime with underlying determinants behind. In both the daytime and the nighttime, high risk mainly occurred in the core urban areas. Nearly 10 more hot-spots were found in the nighttime than those in the daytime. Several old communities in Kowloon stayed at high risk from 2006 to 2016. Some new towns in the New Territories turned to be at higher risk in 2016 compared to 2006 and 2011, and this result showed signs to be emerging hot-spots in the near future. This study would be a useful reference for community-scale heat risk assessment and mitigation for the development of healthy and sustainable high-density cities.

Item Type: Article
Uncontrolled Keywords: Extreme hot weather, Heat vulnerability, Heat risk, Spatial assessment, High-density cities, Hong Kong
Divisions: Faculty of Science and Engineering > School of Environmental Sciences
Depositing User: Symplectic Admin
Date Deposited: 25 Jul 2022 14:33
Last Modified: 18 Jan 2023 20:55
DOI: 10.1016/j.scs.2020.102507
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3159247