83%的主要城市的夜间热量正在迅速上升,威胁着健康,暴露了当前热警示的缺陷。 Nighttime heat is rising rapidly in 83% of major cities, threatening health and exposing flaws in current heat warnings.

一项新的全球研究发现,在分析的100个主要城市中,有83%的城市夜间的高温正在上升,夜间温度在1994年至2024年极端高温期间的上升速度高达白天最高的10倍. A new global study finds dangerous nighttime heat is rising in 83% of 100 major cities analyzed, with nighttime temperatures increasing up to 10 times faster than daytime highs during extreme heat events from 1994 to 2024. 研究突出了日间气温差距缩小的情况,特别是在干燥和潮湿热带地区,使热量更具压迫性和持久性。 The research highlights shrinking day-night temperature gaps, especially in dry and moist tropical regions, making heat more oppressive and persistent. 墨尔本和迪拜等城市的夜间变暖迅速,而欧洲、中东和亚洲部分地区的夜间冷却则减少。 Cities like Melbourne and Dubai saw rapid nighttime warming, while Europe, the Middle East, and parts of Asia experienced reduced nighttime cooling. 研究报告警告说,过夜热的上升会干扰睡眠,妨碍恢复,增加健康风险,特别是对弱势群体而言。 The study warns that rising overnight heat disrupts sleep, hinders recovery, and increases health risks, particularly for vulnerable groups. 目前以日间高温为重点的热警告未能解决这一日益严重的威胁,促使人们呼吁采取24小时热应变战略和更新的城市和公共卫生政策。 Current heat warnings, focused on daytime highs, fail to address this growing threat, prompting calls for 24-hour heat response strategies and updated urban and public health policies.