秋季热浪席卷洛杉矶地区，多地气温连续突破100华氏度
洛杉矶县消息——一股强劲的秋季热浪10月2日笼罩洛杉矶地区，多座城市最高气温突破100华氏度。据天气频道（The Weather Channel）10月2日报道，在高压系统与焚风作用下，圣费尔南多谷、圣盖博谷等内陆社区成为高温中心，沿海地区在海洋层消退后气温也明显攀升，多地发布高温提示。
气象部门提醒，高温天气下户外工作者、长者与儿童中暑风险上升，居民应多补充水分、避免正午剧烈运动，并切勿把儿童或宠物留在车内。洛杉矶县照例开放图书馆、社区中心等避暑中心（cooling centers），有需要的居民可通过县政府网站查询就近地点与开放时间。
报道指出，南加州在秋季出现百度高温并不罕见，圣安娜风季节常伴随高温与低湿度，消防部门同步提醒居民注意野火风险、清理住宅周边可燃物。这轮热浪预计在周末后随海风回归而逐渐缓解。
气象部门解释，南加州秋季的百度高温多与「圣安娜风」有关：内陆高压把干燥空气从沙漠方向吹向沿海，空气下沉增温，沿海平原也随之升至极端高温。高温与低湿度叠加，正是野火最易爆发的天气条件，洛杉矶县消防局已提醒山区与峡谷地带居民保持警戒，提前整理应急包与撤离路线。县公共卫生部门则公布了中暑的识别要点：大量出汗后突然无汗、皮肤发烫、意识模糊是危险信号，应立即拨打911。在洛县，像这样的秋季热浪并不罕见，但卫生官员强调，十月高温往往因居民放松警惕而更容易造成伤害，学校体育活动与户外施工在高温日都应按指引调整。
图片来源：洛杉矶市中心与110号高速公路，Wikimedia Commons，CC BY-SA 4.0，Camiloarenivar
Autumn Heat Wave Pushes Los Angeles Area Temperatures Above 100 Degrees
LOS ANGELES COUNTY — A strong autumn heat wave settled over the Los Angeles area on October 2, with high temperatures topping 100°F in many communities. According to The Weather Channel (October 2), high pressure and offshore winds made inland areas such as the San Fernando and San Gabriel valleys the center of the heat, and coastal temperatures climbed as the marine layer thinned; heat advisories were posted across the region.
Forecasters warned that outdoor workers, older adults and children face elevated risks of heat illness, urging residents to stay hydrated, avoid midday exertion and never leave children or pets in parked cars. Los Angeles County opened its usual network of cooling centers at libraries and community facilities, with locations and hours listed on the county website.
Triple-digit heat is not unusual in Southern California in the fall, when Santa Ana wind season brings hot, dry conditions. Fire officials also reminded residents about elevated wildfire risk and clearing brush around homes. The heat was expected to ease after the weekend as onshore flow returned.
Forecasters explain that Southern California's fall heat spikes usually arrive with Santa Ana winds: inland high pressure pushes dry desert air toward the coast, and as the air descends it warms further, sending even coastal plains to extreme readings. Heat combined with very low humidity is prime wildfire weather, and the county fire department has urged residents near canyons and foothills to stay alert and keep go-bags and evacuation routes ready. The county health department published heatstroke warning signs — sweating that suddenly stops, hot skin and confusion are danger signals requiring a 911 call. October heat waves are a recurring feature of the region, but health officials stress they often injure more people precisely because residents have stopped expecting summer-level heat; schools and outdoor employers are advised to adjust activities on the hottest days.
Photo: Downtown Los Angeles and the 110 Freeway, Wikimedia Commons, CC BY-SA 4.0, Camiloarenivar
图片来源：洛杉矶市中心与110号高速公路，Wikimedia Commons，CC BY-SA 4.0，Camiloarenivar
