南加州遭遇破纪录热浪 气温创十月新高

南加州正经历异常炎热天气，多地气温创下十月单日历史新高。1洛杉矶市中心最高气温达到40℃（104℉），打破1953年10月5日的38.3℃（101℉）记录。1圣安娜气温更是高达41.1℃（106℉），超过同地1953年的39.4℃（103℉）纪录。1当地气温比秋季正常水平高出15至20摄氏度。1

此次热浪的强度和持续时间均属罕见。1洛杉矶过去一周连续四天气温达到100℉或以上，创下该地十月三位数气温的最长连续纪录。1美国国家气象局将此次异常高温归因于高气压脊，导致热空气被困在该地区。1圣巴巴拉至圣地亚哥沿海地区的极端高温预警将持续至周四。1预计周四开始沿海地区将出现降温，下周有降雨预报。1

Southern California is experiencing an unprecedented heat event, with temperatures soaring 15-20 degrees Celsius above typical autumn levels 1. Downtown Los Angeles reached 104°F (40°C), surpassing the previous October daily record of 101°F (38.3°C) set in 1953 1. Santa Ana recorded even higher temperatures, hitting 106°F (41.1°C) and breaking the city's previous October record of 103°F (39.4°C) 1.

The extreme heat has persisted for an extended period, with Los Angeles experiencing four consecutive days of temperatures at or above 100°F, marking the longest streak of triple-digit October temperatures on record for the region 1. The National Weather Service attributed the phenomenon to a high-pressure ridge that has trapped hot air over the area 1. Extreme heat warnings remain in effect from Santa Barbara to San Diego along the coast through Thursday 1. Health officials have advised residents to limit outdoor activities and maintain hydration 1. Relief is expected to arrive Thursday with cooling along coastal areas, with rainfall predicted for the following week 1.