Home > Climate Change > New figures: More of US at risk to sea level rise

New figures: More of US at risk to sea level rise

March 14, 2012


WASHINGTON (AP) — Nearly 4 million people across the United States, from Los Angeles to much of the East Coast, live in homes more prone to flooding from rising seas fueled by global warming, according to a new method of looking at flood risk published in two scientific papers.

The cities that have the most people living within three feet (one meter) of high tide – the projected sea level rise by the year 2100 made by many scientists and computer models – are in Florida, Louisiana, and New York. New York City, often not thought of as a city prone to flooding, has 141,000 people at risk, which is second only to New Orleans’ 284,000. The two big Southeast Florida counties, Miami-Dade and Broward, have 312,000 people at risk combined.

All told, 3.7 million people live in homes within three feet of high tide. More than 500 US cities have at least 10 percent of the population at increased risk, the studies said.

“Southeast Florida is definitely the highest density of population that’s really on low coastal land that’s really most at risk,” said lead author Ben Strauss, a scientist at Climate Central. Climate Central is a New Jersey-based group of scientists and journalists who do research about climate change.

The studies look at people who live in homes within three feet of high tide, whereas old studies looked just at elevation above sea level, according to work published Thursday in the peer-reviewed journal Environmental Research and an accompanying report by Climate Central. That’s an important distinction because using high tide is more accurate for flooding impacts, said study co-author Jonathan Overpeck, a scientist at the University of Arizona’s Institute of the Environment. And when the new way of looking at risk is factored in, the outlook looks worse, Overpeck said.

“It’s shocking to see how large the impacts could be, particularly in southern Florida and Louisiana, but much of the coastal U.S. will share in the serious pain,” Overpeck said.

And it’s not just residents of coastal areas who will be hurt by this, said Sharlene Leurig, a senior manager for the insurance program at Ceres, a Boston-based investment network. Most coastal areas get flood insurance from the federal program and with more flooding, the program will have to spend more and that will come out of all taxpayers’ wallets, she said.

Sea level has already risen about 8 inches since 1880 because warmer waters expand, Strauss said. In addition to the basic physics of ever-warming water expanding, scientist say hotter climate will cause some melting of glaciers in Greenland and western Antarctica that would then cause seas to rise even more.

Flooding from Hurricane Irene last year illustrated how vulnerable coastal places such as Manhattan are with a combination of storms and sea level rise, Strauss said.

Using data from the latest census, Climate Central also has developed an interactive system that allows people to check their risk by entering a ZIP code.

Sea level rise experts at the U.S. Geological Survey and the National Oceanic Atmospheric Administration who weren’t part of the studies said the results make sense and were done by experts in the field.

“All low elevation places in the many urban areas along the coast will become more vulnerable,” said S. Jeffress Williams, scientist emeritus for the USGS, who wasn’t part of the studies. He pointed to Boston, New York City, Norfolk, Va., New Orleans, Charleston, S.C., Miami and Washington and its Virginia suburbs. “More people and infrastructure will be at increasing risk of flooding.”

Online: Climate Central’s report: http://sealevel.climatecentral.org/

  1. silleeellis
    March 18, 2012 at 1:39 pm

    I’ve been blabbering on to what seems to be thin air about ways of preventing the world flooding from ice caps to quick leveling of the sea’s in an impact such as a comet, and that is to cut, carve excavate two Nile rivers through the heart of Africa and Australia and maybe the U.S 10 km wide bigger or smaller with hundreds of run off rivers that will help feed and bring harsh desserts up to living standards but we have to Unite The world first and then employ all the homeless and hungry and bring them up to standards to work in fifteen thousand man teams 100’s of them to start at one end and meet in the middle and the homeless and hungry will have a place to live and survive and brake free of satan’s grips with a guaranteed water front property for them and there children for the next 50 years, bring them hear and train them then they can either go back to work in there country or any country as a highway of employment and relocation in the industries witch will dwarf the mining industries such as selling the dirt and building projects such as barricades of dirt all around New Orleans and any other place under sea level all connected from this one project, real estate the lots, huge wave man made super beaches designed to perfection similar to Dubai, You make the waves you bring the surfer’s, you bring the surfer’s you bring the girls you bring the girls you bring the men you bring the men you bring the ladies and they bring the children and they bring the economy and keep it going with super fish plantations programs to restock the oceans and we will have to do the rest manually such as the nutrients from the desserts to the oceans life circulatory system. All with military prosition and enforcement to neutralize the human race with an undeniable good for all, And rain follows water routes too so more rain more snow so things have to in there wright places, I’m getting cared away, its good to dream hey. I’ve helped build gas lines 60 plus km throught the heart of Australis and I think I could get the job done in ten years if you give me the weak, all of them. See how strong mother fuckers are when they come back to life.

  1. March 14, 2012 at 2:58 pm
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