From Sinking Land To Surging Seas: Here's Why New York City Floods Are Getting Worse

As torrential rains drenched New York City on Friday, streets transformed into rivers, and subway lines came to a halt.

New York Governor Kathy Hochul declared a State of Emergency due to the flash flooding caused by heavy rain in the northeastern U.S. Mayor Eric Adams also advised residents to stay home or seek shelter.

Brooklyn was particularly affected, with videos showing submerged streets and subways. The MTA, the city's transit system, also reported widespread outages and delays.

This alarming frequency of flooding underscores the city's growing vulnerability. But what's behind these intensified flood events?

Several elements are amplifying NYC's susceptibility to these watery onslaughts, according to Insider:

1. Sea Level Surge: The city is grappling with escalating sea levels. Over the last 100 years, the sea level around New York has risen by about 12 inches. Predictions indicate a potential elevation of up to six feet by 2100. By the mid-century, an increase between 11 to 21 inches is anticipated.

2. Land's Gradual Descent: The immense weight of the city, with its sprawling infrastructure and dense population, is reportedly causing the ground to sink gradually. This phenomenon, known as subsidence, results in the city descending at a rate of 1 to 2 mm every year. Some regions even mirror the sinking rate of Venice.

Also Read: New Yorkers Blast Mayor Eric Adams For 'Slow And Muted' Response To Heavy Floods

3. Water's Close Embrace: NYC's extensive 520-mile shoreline, intertwined with rivers and bays, heightens its flood risk, according to Insider. Discussions around a $120 billion sea barrier to safeguard the city from storm surges are reportedly ongoing, but its long-term effectiveness remains a topic of debate.

4. Outdated Infrastructure: The city's antiquated infrastructure, especially its sewer system, intensifies the flood threat. The combined sewer stormwater system can handle just 1.75 inches of rainfall per hour, Insider notes. This system often discharges excess rainwater and untreated sewage into local waterways when overwhelmed.

Heavy rain events are becoming more frequent with the climate crisis deepening, further challenging the city's flood defenses. Recent deluges have poured up to three inches of rain, emphasizing the need for infrastructural enhancements and strategic foresight.

Now Read: First of Its Kind Argonne Dataset Shows Future Flooding Risk at Neighborhood Level

This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.

Photo: Shutterstock