Climate change is causing greater chronic tidal flooding (also called sunny day flooding), which occurs when water from regular tides breach the land, even without storms. This impacts New York City’s low-lying coastal communities, and greater impacts are expected in the future due to increases in sea level. Sea level in New York City has already risen at least 18 inches since the 1850s and could rise as much as another 5.4 feet by 2100. Sections of the city’s coastline will be subject to daily tidal flooding by the 2050s. Some low-lying neighborhoods are already experiencing chronic tidal flooding due to astronomical high tides.
长期遭受洪水侵袭的地区的房屋和公寓楼对居民来说可能变得不安全，而且洪水会损坏房屋和人们的财物。暴露于长期潮汐洪水中的建筑材料可能会保留水分，如果不加以处理，可能会导致霉菌滋生并使居民患上呼吸系统疾病。
纽约人，尤其是年长居民和行动不便的人，在获得医疗服务和其他服务方面也可能面临挑战，因为越来越频繁的慢性洪水影响了他们在附近走动和获得关键服务的能力。来自涨潮的咸水也会腐蚀基础设施并永久损坏电气设备。这会对城市产生长期影响。图书馆和老年中心等社区设施可能会在未来涨潮期间暂时无法使用，并面临长期维修和建设费用。
持续的洪水威胁着纽约市低洼地区的企业。商业区的长期潮汐洪水可能导致建筑物损坏，甚至迫使企业主关闭和搬迁。对于依赖当地客户的小型企业而言，长期洪水期间人流量的减少可能会降低企业的利润率或生存能力。搬迁可能意味着重新开始创业。
Chronic tidal flooding, sometimes called sunny day flooding, in New York City’s coastal communities happens during when water from regular tides breach the land. As sea level rises, higher tides will more frequently impact low-lying coastal areas, especially those around Jamaica Bay. By the 2080s, large portions of certain coastal neighborhoods could flood more than every other week on average. This is projected to impact 86,000 units in 1-2 family buildings, 55% of which are in communities around Jamaica Bay. Chronic tidal flooding has the potential to impact homes and businesses, and it already causes disruptions to New Yorkers day-to-day lives. More data on flood vulnerability will be coming out later in 2023.
浏览下面的纽约市洪水灾害地图，了解更多关于沿海洪水灾害的信息，包括当今威胁城市的慢性潮汐洪水，以及这些洪水灾害在未来可能如何随着气候变化而增加。
