Data & Insights

A Fifth of NYC Built on Bygone Water Now at Risk: Study Maps City’s ‘Blue Zones’

The Cityby Samantha MaldonadoApril 1, 2026

Peering at New York City’s landscape more than 400 years in the past — when the marshes, ponds and streams crisscrossed our string of islands — can help planners and policymakers better understand the city’s flooding future. Researchers at the New York Botanical Garden looked at where water used to

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