More than half of the world’s population currently live in urban areas and are particularly at risk from the combined effects of the urban heat island phenomenon and heat increases due to climate change. Here, by using remotely sensed surface temperature data and social-ecological indicators, focusing on the hot dry season, and applying the risk framework of the Intergovernmental Panel on Climate Change, we assessed the current heat health risk in 139 Philippine cities, which account for about 40% of the country’s total population. The cities at high or very high risk are found in Metro Manila, where levels of heat hazard and exposure are high. The most vulnerable cities are, however, found mainly outside the national capital region, where sensitivity is higher and capacity to cope and adapt is lower. Cities with high levels of heat vulnerability and exposure must be prioritized for adaptation. Our results will contribute to risk profiling in the Philippines and to the understanding of city-level heat health risks in developing regions of the Asia-Pacific.

目前，全球一半以上的人口居住在城市地区，尤其受到城市热岛现象和气候变化导致的热量增加的综合影响。在这里，通过使用遥感的地表温度数据和社会生态指标，重点关注炎热的干燥季节，并应用政府间气候变化专门委员会的风险框架，我们评估了139个菲律宾城市目前的热健康风险。约占该国总人口的40％。在马尼拉大都会发现高风险或高风险的城市，那里的热危害和暴露水平很高。但是，最脆弱的城市主要分布在国家首都地区以外，那里的敏感性较高，应对和适应的能力较低。具有高热脆弱性和高暴露水平的城市必须优先考虑适应。我们的研究结果将有助于菲律宾进行风险分析，并有助于了解亚太地区发展中地区的城市级热健康风险。