Quantcast
Climate
High-tide flooding in Miami, FL, a state that could lose more than 10 percent of its residential properties to chronic flooding by 2100. B137 / CC BY-SA 4.0

Sea Level Rise Could Put 2.4 Million U.S. Coastal Homes at Risk

More than 300,000 U.S. coastal homes could be uninhabitable due to sea level rise by 2045 if no meaningful action is taken to combat climate change, a Union of Concerned Scientists (UCS) study published Monday found.

The study, Underwater: Rising Seas, Chronic Floods and the Implications for U.S. Coastal Real Estate, set out to calculate how many coastal properties in the lower 48 states would suffer from "chronic inundation," non-storm flooding that occurs 26 times a year or more, under different climate change scenarios.


Researchers combined property data from Zillow with three different sea level rise scenarios calculated by the National Oceanic and Atmospheric Administration (NOAA) and found that, in a high sea level rise scenario, $117.5 billion worth of homes, which currently house 550,000 people, would be in danger from chronic flooding within the lifespan of a 30 year mortgage.

"Even homes along the Gulf coast that are elevated would be affected, as they'd have to drive through salt water to get to work or face their kids' school being cut off. You can imagine people walking away from mortgages, away from their homes." UCS senior climate scientist Kristina Dahl told The Guardian.

The report further found that around 14,000 commercial properties worth $18.5 billion would also be at risk by 2045.

By the end of the 21st century, the numbers could rise to 2.4 million homes impacted, worth a total of $912 billion and home to 4.7 million people. If you add commercial properties, the total number of properties impacted by 2100 could be worth more than $1 trillion.

Florida would be the state most impacted by coastal flooding, losing more than 10 percent of its residential properties—about one million homes—by 2100 in a high sea level rise scenario. New Jersey would be second with 250,000 homes lost by 2100, followed by New York with 143,000 homes.

The report also found that around 175 different coastal communities could face chronic flooding that impacted 10 percent or more of their housing stock by 2045. Nearly forty percent of those communities already face poverty levels above the national average. The number of poor communities that stood to lose homes was highest in Louisiana, but low-income communities in North Carolina, New Jersey and Maryland were also at risk.

"People living in these doubly vulnerable communities stand to lose the most, yet have fewer resources to adapt to flooding or relocate to safer areas," the report said.

If action is taken to limit greenhouse gas emissions, the impact of sea level rise could be less financially devastating to coastal property owners. Under NOAA's calculations for a moderate level of sea level rise, around 140,000 homes would be at risk by 2035 and more than 2.1 million by 2100. But in a low sea level rise scenario in which warming is limited to the levels set in the Paris agreement, the number of homes at risk by 2060 would decrease by nearly 80 percent, the study found.

Show Comments ()

EcoWatch Daily Newsletter

Sponsored
Adventure
Muir Woods, which costs $10 for entry, will have free entry on Sept. 22. m01229 / Flickr / CC BY-NC 2.0

Visit Any National Park for Free This Saturday to Celebrate 25th National Public Lands Day

If you're stuck for plans this weekend, we suggest escaping your city or town for the great outdoors.

This Saturday marks the 25th National Public Lands Day, organized by the National Environmental Education Foundation (NEEF).

Keep reading... Show less
Climate
A glacier flows towards East Antarctica. NASA Goddard Space Flight Center / CC BY 2.0

Temperatures Possible This Century Could Melt Parts of East Antarctic Ice Sheet, Raise Sea Levels 10+ Feet

A section of the East Antarctic Ice Sheet that contains three to four meters (approximately 10 to 13 feet) of potential sea level rise could melt if temperatures rise to just two degrees above pre-industrial levels, a study published in Nature Wednesday found.

Researchers at Imperial College London, the University of Queensland, and other institutions in New Zealand, Japan and Spain looked at marine sediments to assess the behavior of the Wilkes Subglacial Basin during warmer periods of the Pleistocene and found evidence of melting when temperatures in Antarctica were at least two degrees Celsius above pre-industrial levels for periods of 2,500 years or more.

Keep reading... Show less
Energy
Oil well in North Dakota. Tim Evanson / Flickr / CC BY-SA 2.0

Pipeline Leaks 63,840 Gallons of Produced Water in North Dakota

A pipeline released 63,840 gallons (1,520 barrels) of produced water that contaminated rangeland in Dunn County, North Dakota, the Bismarck Tribune reported, citing officials with the North Dakota Department of Health.

Produced water is a byproduct of oil and gas extraction, and can contain drilling chemicals if fracking was used.

Keep reading... Show less
Insights
Residents stand in a long queue to fill water containers on May 27 in Shimla, India. Deepak Sansta / Hindustan Times / Getty Images

World Peace Requires Access to Safe Water

International Peace Day is Sept. 21. Mekela Panditharatne, attorney with the Natural Resources Defense Council, submitted the following op-ed to EcoWatch in commemoration.

In drought-ravaged East Africa, the cracks in the plains echo the fault lines splitting tribes.

Across the globe, the devastation of deadly brawls is being exacerbated by tensions over access to water. Water crises, often worsened by governance failures, can portend warning signs for instability and conflict. This year, the World Resources Institute cautioned that water stress is growing globally, "with 33 countries projected to face extremely high stress in 2040." The effects of such water stress span the gamut from civil unrest to open warfare.

Keep reading... Show less
Sponsored
Food

How Your Personality Type Could Influence Your Food Choices

By Melissa Kravitz

"You are what you eat" may be one of the oldest sayings ever to be repeated around the dinner table, but can you also eat what you are?

Keep reading... Show less
Climate
A child rides his bicycle in an area affected by the Hurricane Maria passing in Toa Baja, Puerto Rico on Oct. 5, 2017. RICARDO ARDUENGO / AFP / Getty Images

Hurricane Maria's Legacy: One Year Later

As Puerto Rico marked one year since Hurricane Maria made landfall yesterday, the Miami Herald this week ran extensive reports in English and Spanish on the island's continuing recovery.

Keep reading... Show less
Sponsored
Science
A foldable, biodegradable battery based on paper and bacteria. Seokheun Choi / Binghamton University, CC BY-ND

Could Paper Power the Next Generation of Devices?

By Seokheun Choi

It seems like every few months there's a new cellphone, laptop or tablet that is so exciting people line up around the block to get their hands on it. While the perpetual introduction of new, slightly more advanced electronics has made businesses like Apple hugely successful, the short shelf life of these electronics is bad for the environment.

Keep reading... Show less
Business
Blue Point Brewing Company

Long Island Brewer Launches 'Good Reef Ale' to Help Restore New York’s Oyster Reefs

Between the 1600s and the early 20th century, European settlers in New York City ate their way through 220,000 acres of oyster reefs covering 350 square miles, The Washington Post reported.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!