Mayor Announces $10 Billion Plan to Save NYC From Rising Seas

Climate Proof

New York City Mayor Bill de Blasio has a plan to "climate-proof" his city.

In an op-ed published in New York Magazine on Wednesday, de Blasio detailed his $10 billion plan to protect Manhattan from the coming rising sea levels and powerful storms that seem almost inevitable in the face of climate change.

"It will be one of the most complex environmental and engineering challenges our city has ever undertaken," de Blasio wrote, "and it will, literally, alter the shape of the island of Manhattan."

$10 Billion Buffer

To fortify most of Lower Manhattan, de Blasio's plan allocates $500 million toward the creation of grassy stationary barriers in parks and removable barriers that the city can deploy just prior to a storm.

But those types of barriers won't work to protect the eastern edge of Lower Manhattan, which de Blasio noted is just 8 feet above sea level — and tightly packed with vulnerable utilities, sewer systems, and subway lines.

The only option then, according to de Blasio, is to build more land — by pushing the coastline of Lower Manhattan from the Brooklyn Bridge to the Battery up to 500 feet into the East River.

"When we complete the coastal extension, which could cost $10 billion, Lower Manhattan will be secure from rising seas through 2100," de Blasio wrote.

National Security

Ninety thousand people call Lower Manhattan home, but the need to protect the area is about far more than the local population. Lower Manhattan is also home to New York's Financial District, which includes the United States' — and, arguably, the world's — economic center: Wall Street.

According to de Blasio, climate-proofing this area "should be as much a national priority as a local one — protecting the global center of commerce, the Federal Reserve, the home to a sector of our economy that touches every town and region in America."

But the threat of climate change isn't limited to New York — as de Blasio noted, other coastal cities, including Miami, Houston, and Charleston, are also staring down the same alarming fate.

"Preparing for climate change has to be a national priority, backed by tens of billions in federal investment," de Blasio wrote. "Lives are on the line."

READ MORE: My New Plan to Climate-Proof Lower Manhattan [New York Magazine]

More on climate change: Why Sea Levels Along the US East Coast Are Rising at Different Rates