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After a $14-Billion Upgrade, New Orleans' Levees Are Sinking

           

Credit: Mario Tama Getty Images

Sea-level rise and ground subsidence will render the flood barriers inadequate in just four years

CLICK HERE - STATEMENT - Army Corps of Engineers (2 page .PDF document)

scientificamerican.com - by Thomas Frank, E&E News - April 11, 2019

The $14 billion network of levees and floodwalls that was built to protect greater New Orleans after Hurricane Katrina was a seemingly invincible bulwark against flooding.

But now, 11 months after the Army Corps of Engineers completed one of the largest public works projects in world history, the agency says the system will stop providing adequate protection in as little as four years because of rising sea levels and shrinking levees.

The growing vulnerability of the New Orleans area is forcing the Army Corps to begin assessing repair work, including raising hundreds of miles of levees and floodwalls that form a meandering earth and concrete fortress around the city and its adjacent suburbs.

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Sea Levels May Rise Much Faster Than Previously Predicted, Swamping Coastal Cities Such as Shanghai, Study Finds

           

Icebergs off coast of Greenland. - Credit: Kertu / Adobe Stock

CLICK HERE - STUDY - PNAS - Ice sheet contributions to future sea-level rise from structured expert judgment

cnn.com - by Sareena Dayaram - May 21, 2019

Global sea levels could rise more than two meters (6.6 feet) by the end of this century if emissions continue unchecked, swamping major cities such as New York and Shanghai and displacing up to 187 million people, a new study warns.

The study, which was released Monday, says sea levels may rise much faster than previously estimated due to the accelerating melting of ice sheets in both Greenland and Antarctica.

The international researchers predict that in the worst case scenario under which global temperatures increase by 5 degrees Celsius (9 degrees Fahrenheit) by 2100, sea levels could rise by more than two meters (6.6 feet) in the same period -- double the upper limit outlined by the UN climate science panel's last major report.

(CLICK HERE - READ COMPLETE ARTICLE)

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National Storm Surge Hazard Maps

https://noaa.maps.arcgis.com/apps/MapSeries/index.html?appid=d9ed7904dbec441a9c4dd7b277935fad&entry=1

This national depiction of storm surge flooding vulnerability helps people living in hurricane-prone coastal areas along the U.S. East and Gulf Coasts, Puerto Rico, U.S. Virgin Islands (USVI), Hawaii, and Hispaniola to evaluate their risk to the storm surge hazard. These maps make it clear that storm surge is not just a beachfront problem, with the risk of storm surge extending many miles inland from the immediate coastline in some areas. If you discover via these maps that you live in an area vulnerable to storm surge, find out today if you live in a hurricane storm surge evacuation zone as prescribed by your local emergency management agency. If you do live in such an evacuation zone, decide today where you will go and how you will get there, if and when you're instructed by your emergency manager to evacuate. If you don't live in one of those evacuation zones, then perhaps you can identify someone you care about who does live in an evacuation zone, and you could plan in advance to be their inland evacuation destination – if you live in a structure that is safe from the wind and outside of flood-prone areas.

National Hurricane Center - National Storm Surge Hazard Maps - Version 2
https://www.nhc.noaa.gov/nationalsurge/

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Underwater: Rising Seas, Chronic Floods, and the Implications for US Coastal Real Estate (2018)


CLICK HERE - STUDY - Union of Concerned Scientists - Underwater - Rising Seas, Chronic Floods, and the Implications for US Coastal Real Estate (28 page .PDF document)

ucsusa.org - June 2018

Sea levels are rising. Tides are inching higher. High-tide floods are becoming more frequent and reaching farther inland. And hundreds of US coastal communities will soon face chronic, disruptive flooding that directly affects people's homes, lives, and properties.

Yet property values in most coastal real estate markets do not currently reflect this risk. And most homeowners, communities, and investors are not aware of the financial losses they may soon face.

This analysis looks at what's at risk for US coastal real estate from sea level rise—and the challenges and choices we face now and in the decades to come.

(CLICK HERE - READ COMPLETE ARTICLE)

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Greenland is Melting Even Faster Than Experts Thought, Study Finds

           

CLICK HERE - STUDY - PNAS - Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018

cnn.com - by Jen Christensen - April 23, 2019

Climate change is eliminating giant chunks of ice from Greenland at such a speed that the melt has already made a significant contribution to sea level rise, according to a new study. With global warming, the island will lose much more, threatening coastal cities around the world.

Forty percent to 50% of the planet's population is in cities that are vulnerable to sea rise, and the study published Monday in the Proceedings of the National Academy of Sciences is bad news for places like New York, Miami, Los Angeles, Tokyo and Mumbai.

(CLICK HERE - READ COMPLETE ARTICLE)

CLICK HERE - NASA - GRACE-FO - Greenland Ice Loss 2002-2016

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Project to Raise Homes, Move Families in Southwest Coastal Louisiana Moves Forward

           

Carlos Ortega, a worker with Clesi Foundations, moves support wood at a house being raised in Harvey in August 2011. (Photo by Susan Poag, The Times-Picayune archive)

nola.com - by Sara Sneath - March 11, 2019

A study to determine which homes in Southwest Coastal Louisiana will qualify for voluntary relocation or elevation recently received funding after much back-and-forth between parish officials and the U.S. Army Corps of Engineers.

While financing for the study only accounts for a small chunk of the overall project, it represents the first time a non-structural project within the state’s coastal master plan has been given funding, said Coastal Protection and Restoration Authority of Louisiana Board Chairman Chip Kline. Flood proofing businesses, home elevations and voluntary home acquisitions are all considered non-structural measures. The most recent version of the 50-year plan estimates 26,569 homes and businesses across Louisiana will be eligible for help, at a cost of more than $6 billion.

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Study of Antarctic Sea Ice Collapse Warns of Potential 10-Foot Sea Rise

           

PACK ICE MELTING IN SPRING IN ANTARCTICA'S WEDDEL SEA. CREDIT: PLANET OBSERVER/UNIVERSAL IMAGES GROUP VIA GETTY IMAGES

The faster the ocean warms, the faster key Antarctic glaciers will disintegrate.

CLICK HERE - STUDY - Four decades of Antarctic Ice Sheet mass balance from 1979–2017

thinkprogress.org - by Joe Romm - January 15, 2019

A stunning new study on Antarctic sea ice collapse greatly raises the risk of a 10-foot sea level rise this century if President Donald Trump’s climate policies aren’t quickly reversed.

Warming ocean waters drove a 6-fold increase in annual ice mass loss from the Antarctic ice sheet between 1979 and 2017, according to a new study in the Proceedings of the National Academy of Sciences.

It’s been known for a while that the West Antarctic Ice Sheet (WAIS) was unstable and collapsing at an accelerating rate due to global warming. But the new study finds that parts of the vastly larger East Antarctic Ice Sheet (EAIS) are also disintegrating.

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Report Seeks to 'Future-Proof' Texas From Climate Change Without Saying So Directly

CLICK HERE - REPORT - Eye of the Storm - Report of the Governor's Commission to Rebuild Texas (168 page .PDF report)

The report calls Hurricane Harvey a warning that should not be ignored. "The enormous toll on individuals, businesses and public infrastructure should provide a wake-up call underlining the urgent need to 'future-proof' the Gulf Coast - and indeed all of Texas - against future disasters.'"

govtech.com - BY ANNA KUCHMENT, THE DALLAS MORNING NEWS / DECEMBER 13, 2018

To protect itself from the next major hurricane, Texas will have to build storm-surge barriers, shore up wetlands, buy out residents who live in vulnerable areas, rethink development plans and raise the first floors of existing buildings, suggests a sweeping new report prepared for Gov. Greg Abbott and released Thursday afternoon. 

The new recommendations come from Abbott's Commission to Rebuild Texas, led by Texas A&M Chancellor John Sharp . . .

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Portrait of a Planet on the Verge of Climate Catastrophe

           

How South Beach, Miami, could look if temperatures rise by 2C. Photograph: Nickolay Lamm/Courtesy of Climate Central/sealevel.climatecentral.org

As the UN sits down for its annual climate conference this week, many experts believe we have passed the point of no return

theguardian.com - by Robin McKie - December 2, 2018

On Sunday morning hundreds of politicians, government officials and scientists will gather in the grandeur of the International Congress Centre in Katowice, Poland . . . For 24 years the annual UN climate conference has served up a reliable diet of rhetoric, backroom talks and dramatic last-minute deals aimed at halting global warming . . .

. . . As recent reports have made clear, the world may no longer be hovering at the edge of destruction but has probably staggered beyond a crucial point of no return. Climate catastrophe is now looking inevitable.

(CLICK HERE - READ COMPLETE ARTICLE)

 

 

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FEMA Flood Maps Ignore Climate Change, and Homeowners Are Paying the Price

           

The flood maps don’t factor in sea level rise or changes in extreme weather, and many are years out of date. In Mexico Beach, 'minimal-risk' homes were swept away.

insideclimatenews.org - by James Bruggers - November 1, 2018

The official map laid it out for more than 200 homes within the community of Mexico Beach, Florida: the federal government had characterized their flooding risks as minimal, despite their near-beachfront locations.

That meant for them there were no requirements to buy flood insurance, and local residents say many did not.

When Hurricane Michael and its 155-mile-per-hour winds slammed into the town on Oct. 10, with a storm surge of perhaps 19 feet, the result was devastation. An analysis by coastal geologists from Western Carolina University has found that 70 percent of the homes were demolished. Another 10 percent were severely damaged.

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