香港气象部门9月9日（周日）记录到36.9°C的历史最高气温，打破自1884年以来的记录[1]。这一读数超越了2017年8月22日台风哈托期间创造的36.6°C纪录[1]。其中，上水地区气象站更是测得39.8°C的极端高温，为该站自1980年代启用自动气象系统以来的最高值[1]。
此次热浪由台风海豚引发[1]。该台风于周日下午约5时30分在浙江省玉环县附近登陆，登陆地点距离香港约1000公里[1]。台风中心最大持续风速达94英里/小时（151公里/小时），相当于萨菲尔-辛普森量表1级飓风[1]。台风带来的暖空气和外围下沉气流导致了这场严重热浪[1]。气象部门已发布"酷热天气警告"，建议市民多喝水、避免剧烈室外运动[1]，并预计极端高温将持续到周二[1]。
Hong Kong's meteorological authorities recorded a temperature of 36.9°C on Sunday, September 9, marking the highest temperature since records began in 1884 [1]. This surpassed the previous record of 36.6°C set on August 22, 2017, during Typhoon Hato [1]. The extreme heat was driven by warm air and descending currents brought by Typhoon Dolphin, which made landfall near Yuen County in Zhejiang Province at approximately 5:30 p.m. with maximum sustained winds of 94 mph (151 km/h), equivalent to a Category 1 hurricane on the Saffir-Simpson scale [1]. The landing site was approximately 1,000 kilometers (620 miles) from Hong Kong [1].
Temperatures soared even higher in some areas, with the weather station in Sheung Shui recording 39.8°C, the highest reading from automated weather stations dating back to the 1980s [1]. Meteorological authorities issued a "very hot weather warning," advising residents to drink plenty of water and avoid strenuous outdoor activities [1]. The department projected that extreme temperatures would persist through Tuesday [1].