圣迭戈10月2日气温冲上90多度，逼近历史同期最高纪录
圣迭戈县消息——通常以气候温和著称的圣迭戈10月2日迎来罕见高温，市区最高气温冲上90多华氏度，逼近历史同期的最高纪录。据天气频道（The Weather Channel）10月2日报道，这轮高温由内陆高压与离岸风共同造成，原本受海风调节的沿海社区也未能幸免，内陆谷地气温更高。
气象预报员指出，圣迭戈10月平均高温通常在70多华氏度，这次的热度明显反常。高温之下，海滩与公园人流增加，卫生部门提醒居民注意防暑降温，户外活动避开正午时段，并关注长者与慢性病患者的身体状况。县内多座城市照例开放图书馆等公共设施作为避暑场所。
这轮热浪与整个南加州的高温天气同属一个天气系统。预报显示，随着周末海洋气流回归，圣迭戈气温将逐步回落至季节正常水平，但内陆地区回落速度会慢一些。居民可通过国家气象局圣迭戈办公室获取最新高温提示。
圣迭戈向来以「五月灰、六月霾」的凉爽初夏和温和秋季自居，这次冲上90多度的高温在当地社交媒体上引发热议，不少居民晒出车内温度计照片。国家气象局圣迭戈办公室提醒，即便在海滩，紫外线与高温的组合也容易让人脱水，救生员在热门海滩增加了巡查人手；内陆社区如埃尔卡洪（El Cajon）一带气温更高，学区提醒学校调整户外体育活动。气象部门同时指出，这轮高温的成因与同期影响洛杉矶、橙县的天气系统相同，都源于内陆高压与离岸风，整个南加州沿海罕见地同时失去海风调节。随着周末高压东移、海风回归，圣迭戈气温有望回到70多度的常态，但预报员提醒，十月仍可能再有短暂高温反复。
图片来源：南加州海岸线航拍（圣克莱门特一带），Wikimedia Commons，CC BY-SA 4.0，Joe Mabel
San Diego Swelters in Mid-90s Heat, Closing In on October Record
SAN DIEGO COUNTY — San Diego, known for its mild climate, baked in unusual heat on October 2, with the city's high reaching the mid-90s and closing in on the record for the date. According to The Weather Channel (October 2), inland high pressure and offshore winds drove the spike, coastal neighborhoods that are normally cooled by sea breezes saw sharp warming, and inland valleys ran even hotter.
Forecasters noted that San Diego's average October high is in the 70s, making the reading distinctly abnormal. Beaches and parks drew crowds, and health officials urged residents to stay cool, avoid midday activity outdoors and check on older adults and people with chronic conditions. Cities across the county opened libraries and other public buildings as cooling spaces, as is customary during heat events.
The heat was part of the same weather system affecting all of Southern California. Onshore flow returning over the weekend was expected to bring temperatures back toward seasonal norms, though inland areas will cool more slowly. The National Weather Service's San Diego office is posting updated advisories.
San Diego prides itself on mild weather — locals joke about "May Gray and June Gloom" — so a mid-90s reading set off a wave of social-media posts, many showing car thermometers. The National Weather Service in San Diego cautioned that even at the beach, the mix of strong sun and heat dehydrates people quickly, and lifeguards added patrols at popular beaches; inland spots such as El Cajon ran hotter still, and school districts were advised to adjust outdoor activities. The same inland high pressure and offshore flow driving the heat in Los Angeles and Orange County was responsible here, stripping the whole Southern California coast of its usual sea-breeze relief at once. As the high moves east over the weekend and onshore flow returns, San Diego should settle back into the 70s, though forecasters warn brief October warm-ups can still recur.
Photo: Southern California coastline near San Clemente, aerial view, Wikimedia Commons, CC BY-SA 4.0, Joe Mabel
图片来源：图：圣迭戈拉霍亚湾晴日海滩。摄影：Stephen Bay，CC BY 4.0，来源：Wikimedia Commons
