Officials say new projections show 800,000 New York City residents could be living in flood zone that would cover a quarter of the city's land by the 2050s as rising seas and other effects of global warming take hold.

David Greedy, Getty Images

The number of 90-degree days in the city could double or even triple to echo what Birmingham, Ala., now has. And 8 percent of New York City's coastline could flood just from high tides.

Two top aides to Mayor Michael Bloomberg discussed the findings Monday. Bloomberg is scheduled to present recommendations Tuesday for dealing with climate risks.

A panel of scientists made the new projections. In some cases, they echo estimates the group made in 2009 but move up the time frame from the end of the century to the middle.

 

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