纽波特海滩因洪水关闭全部海滩与码头，橙县沿海洪水警报持续至周日下午
美国国家气象局已对橙县沿海地区发布沿海洪水警报，有效期持续至周日下午 3 点。气象局警告，海平面升高、强劲的向岸风与不断增强的涌浪叠加，可能导致显著的海滩侵蚀与洪水。纽波特海滩市政府周六关闭了全市所有海滩与码头，并要求民众远离水域。
预报显示，最危险的时段出现在涨潮前后。潮汐水位可能超过 7 英尺，与强劲海浪叠加，淹没低洼街区、道路与商户。海浪高度预计达到 5 至 7 英尺，部分海浪组合可达 9 英尺，海水可能漫过海滨步道并倒灌进低洼街道。
纽波特海滩市出动工作人员重建沙堤、运转抽水泵，并打开潮汐阀门以排走街道积水。市政府呼吁居民将车辆移至高处，用沙袋保护物业，绝不要绕行警戒线或试图驾车穿越被淹没的道路。
这一轮沿海洪水与热带风暴「蕾切尔」在下加州外海激起的长周期涌浪有关。尽管风暴中心预计在下加州北部登陆、不会直接冲击加州海岸，但涌浪能量将长途传播至加州海岸，在涨潮窗口叠加出高水位。圣迭戈县救生员部门已警告南向浪点的游泳者避免下水。
气象局圣迭戈办公室表示，海浪与潮汐状况将在周日上午达到高峰，之后随着风暴减弱而逐渐缓解。沿海居民与游客在警报解除前应避开海滩与码头区域，听从地方救生员与应急部门的指引。
Newport Beach Closes All Beaches and Piers as Orange County Coastal Flood Warning Extends Into Sunday
The National Weather Service has issued a coastal flood warning for Orange County beaches through 3 p.m. Sunday, cautioning that elevated ocean levels, strong onshore winds and building swells could cause significant flooding and beach erosion. The city of Newport Beach shut down all its beaches and piers on Saturday and urged the public to stay out of the water.
The most dangerous conditions are expected around high tide, when tides exceeding 7 feet could combine with powerful surf to inundate low-lying neighborhoods, roads and businesses. Waves are forecast to reach 5 to 7 feet, with sets as high as 9 feet possible, and seawater may breach boardwalks and back up into low-lying streets.
Newport Beach deployed crews to rebuild sand berms, operate pumps and open tidal valves to drain flooded streets. Officials are urging residents to move vehicles to higher ground, protect properties with sandbags, and never drive around barricades or attempt to cross flooded roads.
The coastal flooding is linked to long-period swells generated by Tropical Storm Rachel off Baja California. Although the storm's center is expected to make landfall in northern Baja and not strike the California coast directly, the swell energy will travel far north and combine with high tides to produce elevated water levels. San Diego County lifeguards have advised swimmers to stay out of the water at south-facing breaks.
The NWS San Diego office said surf and tide conditions should peak Sunday morning and gradually ease as the storm weakens. Coastal residents and visitors should avoid beaches and piers until warnings are lifted and follow guidance from local lifeguards and emergency officials.
图片来源：图：纽波特海滩巴尔博亚码头（Balboa Pier）与半岛海岸航拍（资料图）。摄影：Don Ramey Logan，CC BY 4.0，来源：Wikimedia Commons
