Canada’s coastal communities in race against time

Canada’s coastal communities in race against time

Sea level maps show Canada’s coastal communities are in race against time

From the slow-paced, tree-lined streets of downtown Charlottetown to the modern, western architecture of metro Vancouver, Canada’s urban waterfronts are a beacon for condo developers, tourists and everyone in between.

But even in best-case scenarios for global warming, a new series of interactive maps that illustrate the impact of rising sea levels suggest Canada is facing a mind-boggling challenge to keep such popular and often historic neighbourhoods from becoming lost at sea.

John Clague, an earth sciences professor at Simon Fraser University in British Columbia, says thanks to global warming, our oceans are getting an average of 3.3 millimetres higher every year, up from 2 mm a year in the latter half of the 20th century.

Related: Freezer malfunction melts arctic ice samples used in climate change research

The United Nations predicts the world’s oceans will be at least one metre higher by the end of the current century. After another 100 years, it could be four times that.

“I call it a disaster in slow-mo,” said Clague. “It is really a huge problem. It’s a global problem and the cost of dealing with this or not dealing with it, depending on what happens, is enormous.”

The U.S.-based organization Climate Central has created interactive maps (http://bit.ly/2j3lJu3) that show how Canadian cities could look if the average global temperature rises between one and four degrees Celsius by 2100. All of the scenarios are based on no mitigation efforts taking place, although some areas do already have existing dikes or protections.

The world has already passed the one-degree threshold. The Paris climate change accord aims to stave off 2 degrees by the end of the century, but the United Nations warned last week the world has committed to only one-third of the emissions cuts necessary to meet that goal.

The Climate Central maps show that in Charlottetown, the harbourfront will be at risk at two degrees. At four degrees, homes several blocks from the waterfront would become oceanfront properties. Lennox Island, a First Nations community off the northwest coast of P.E.I., could lose its bridge to the mainland in the best case scenario. At worst, the entire island disappears beneath the sea.

In Halifax, the harbourfront, port and rail lines could all be submerged. The city of Charlemagne, Que., east of Montreal, could lose entire neighbourhoods to the St. Lawrence River at two degrees, while at the four-degree threshold, the birthplace of singer Celine Dion has almost no dry spots at all.

Related: Climate change could impact fish

The problem could well be most dire in Vancouver, said Clague.

“Metro Vancouver is the most vulnerable urban area in Canada to sea level rise,” he said. “We have about 250,000 people living within about a metre of mean sea level.”

At two degrees, hundreds of homes and businesses in North Vancouver would be underwater, as would large parts of the False Creek waterfront. At four degrees, famed Stanley Park becomes an island and the Vancouver neighbourhoods of Mount Pleasant and Fairview become a sea of blue.

Richmond, B.C., is only one metre above sea level now, but director of engineering John Irving said Wednesday the city has been preparing for sea level rise for years. Between building up existing dikes and building “superdikes” that are more than 50 metres wide, the city is getting ready as fast as it can, he said.

In most communities, flood prevention is in the early planning stages, focused largely on preventing new development in high-risk areas and building dikes around existing areas to try and keep them from harm.

Then there are the costs: Clague said in the Fraser Delta area alone, it would cost a projected $10 billion to build up against coastal and Fraser River flooding.

The Fraser Basin Council in 2016 found 71 per cent of its existing dikes were vulnerable in the event of a major coastal flood or on the Fraser River.

The cause of rising sea levels is twofold. Global warming is happening twice as fast in the Arctic as it is in the rest of the world, and sea ice is melting at a rapid pace. In addition, the oceans are warming up and warmer water takes up more space.

Mia Rabson, The Canadian Press

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

This coming Thursday, Jan. 28, is Bell Let’s Talk Day, and conversations about mental health would serve many of us well as the pandemic persists. (Zackary Drucker/The Gender Spectrum Collection)
Editorial: Let’s talk about our mental health in a pandemic

Bell Let’s Talk Day is Thursday, Jan. 28

Nanaimo RCMP are looking for Peter Ludvigson who is wanted on a Canada-wide warrant. (Photo submitted)
Nanaimo man wanted, police say he violated terms of his release

Warrant out for 45-year-old Peter Ludvigson

Nanaimo’s Fiddelium fiddle ensemble, seen here at a fiddle workshop with visiting instructors Gordon Stobbe and J.J. Guy this summer, is recording its first album. (Photo courtesy Trish Horrocks)
Nanaimo youth fiddle ensemble Fiddelium recording first album

Fiddlers recording their parts one at a time in observance of COVID-19 safety

Jesse Savidant, 31, is wanted by the RCMP after failing to appear in provincial court in Nanaimo in December. Police warn Savidant should be considered violent. (Photo Submitted)
Warrant out for man with alleged stolen property offences across Vancouver Island

Jesse Savidant did not appear for court date in Nanaimo last month, say RCMP

Emergency crews were called to a three-vehicle crash Monday morning on the old Island Highway close to Rock City Road. (Greg Sakaki/News Bulletin)
Car, pickup and semi truck crash along the highway in Nanaimo

Incident happened in front of Rock City Plaza on Monday morning

Emergency crews were called to a three-vehicle crash Monday morning on the old Island Highway close to Rock City Road. (Greg Sakaki/News Bulletin)
Car, pickup and semi truck crash along the highway in Nanaimo

Incident happened in front of Rock City Plaza on Monday morning

Residents of the Cowichan Valley decorated more than 55 vehicles with anti-racist slogans for a car rally in support of Cowichan Tribes on Saturday, January 24. (Kevin Rothbauer/Citizen)
Dozens join anti-racism car rally and virtual panel in Cowichan Valley

Provincial ministry and BC Green caucus issue joint statement detailing concerns

Rolling seven-day average of cases by B.C. health authority to Jan. 21. Fraser Health in purple, Vancouver Coastal red, Interior Health orange, Northern Health green and Vancouver Island blue. (B.C. Centre for Disease Control)
2nd COVID vaccine doses on hold as B.C. delivery delayed again

New COVID-19 cases slowing in Fraser Health region

The Pacific Rim National Park Reserve is urging visitors to stay on designated trails after a hiker became injured in an unsanctioned area last week. (Westerly file photo)
Injured hiker rescued in Pacific Rim National Park Reserve

“Safety is everyone’s responsibility.”

Provincial health officer Dr. Bonnie Henry talk about the next steps in B.C.’s COVID-19 Immunization Plan during a press conference at Legislature in Victoria, B.C., on Friday, January 22, 2021. Two more cases of the COVID-19 strain first identified in South Africa have been diagnosed in British Columbia, bringing the total to three as of Jan. 16.THE CANADIAN PRESS/Chad Hipolito
B.C. now has three cases of South African COVID-19 variant, six of U.K. strain

Both variants are thought to spread faster than earlier strains

Rodney and Ekaterina Baker in an undated photo from social media. The couple has been ticketed and charged under the Yukon’s <em>Civil Emergency Measures Act</em> for breaking isolation requirements in order to sneak into a vaccine clinic and receive Moderna vaccine doses in Beaver Creek. (Facebook/Submitted)
Great Canadian Gaming CEO resigns after being accused of sneaking into Yukon for vaccine

Rod Baker and Ekaterina Baker were charged with two CEMA violations each

Police discovered a makeshift nightclub in a Vancouver apartment on Jan. 23, 2021, and say it wasn’t the first time this month officers have been called to the unit over social gathering concerns. (Phil McLachlan - Capital News)
Doorman of makeshift ‘booze-can’ in Vancouver apartment fined; police look to court order

This marks the fourth complaint about social gatherings inside the apartment in January

Local musician and artist Daisy Melville created a watercolour portrait of U.S. Senator Bernie Sanders from the recent American inauguration, and with help from her mom, is now selling t-shirts and more with funds going to the Comox Valley Food Bank. Image submitted
Island artist turns Sanders inauguration meme into art for good

All proceeds from the sale of shirts, sweaters and more will go to the Comox Valley Food Bank

A Kelowna couple welcomed their Nooner baby in December. (Flytographer)
Kelowna couple welcomes baby girl from Hotel Zed Nooner campaign

Nicole and Alex will now have 18 years of free stays at the hotel

Most Read