NYC Sea-Level Rise Projection: Up to 800K in Flood Zones by 2050

An official report projects sea levels around New York City could rise up to 58 cm by 2050, increasing high-tide flood days from 10 to 85 per year and placing up to 800,000 residents in flood zones. The projection is based on current climate models and is not a forecast of a specific event, but it signals a significant long-term infrastructure and adaptation challenge. The report's methodology and exact assumptions are not detailed in the source, so the figures should be treated as a planning estimate.