Damaged roads in South Africa after severe flooding on August 8, 2024. Two Swartland dams burst their banks on that day, causing severe floods in the area. AFP
Damaged roads in South Africa after severe flooding on August 8, 2024. Two Swartland dams burst their banks on that day, causing severe floods in the area. AFP
Damaged roads in South Africa after severe flooding on August 8, 2024. Two Swartland dams burst their banks on that day, causing severe floods in the area. AFP
Damaged roads in South Africa after severe flooding on August 8, 2024. Two Swartland dams burst their banks on that day, causing severe floods in the area. AFP

Climate

Coastal flooding to almost double by turn of the century, study shows

Global coastlines, tropical Africa and Asia and arid North Africa to be particularly affected

Soraya Ebrahimi
Soraya Ebrahimi

August 21, 2024

  • English
  • Arabic

Flooding around the world is likely to increase significantly in decades ahead if countries fail to meet official pledges to cut carbon emissions, new research shows.

The latest study led by researchers from the University of Bristol and water risk intelligence firm Fathom looked at forecasts for different types of flooding in various climate change scenarios.

High climate sensitivity and broken promises to reduce carbon emissions could allow the extent of flooding to increase by about half between 2020 and around 2100.

“This research represents the culmination of years of research on our quest to help future-proof communities from the evolving risk of flooding,” lead author Dr Oliver Wing, honorary research fellow at the University of Bristol Cabot Institute for the Environment and chief research officer at Fathom, said.

“The findings underscore the vital importance of all countries keeping their promise to cut carbon emissions.”

Deadly flash floods sweep through northern Afghanistan – in pictures

A car is stuck in mud after flash flooding hit Shahrak Muhajireen village in Baghlan, Afghanistan, on May 10. EPA
A car is stuck in mud after flash flooding hit Shahrak Muhajireen village in Baghlan, Afghanistan, on May 10. EPA
Homes were damaged in the village by the flash floods, with some being swept away entirely. EPA
Homes were damaged in the village by the flash floods, with some being swept away entirely. EPA
More than 300 people were killed in northern Afghanistan. EPA
More than 300 people were killed in northern Afghanistan. EPA
After heavy rain, flash flooding tore through five districts of Baghlan in the north. EPA
After heavy rain, flash flooding tore through five districts of Baghlan in the north. EPA
The death toll is expected to rise as many people are still missing. EPA
The death toll is expected to rise as many people are still missing. EPA
Many homes were swamped with mud. The provinces of Badakhshan, Baghlan, Ghor and Herat were the worst affected. EPA
Many homes were swamped with mud. The provinces of Badakhshan, Baghlan, Ghor and Herat were the worst affected. EPA
Heavy seasonal rain caused the flooding and residents were unprepared for the sudden rush of water. EPA
Heavy seasonal rain caused the flooding and residents were unprepared for the sudden rush of water. EPA
A man surveys his damaged house after flash floods in Shahrak Muhajireen village in Baghlan. EPA
A man surveys his damaged house after flash floods in Shahrak Muhajireen village in Baghlan. EPA
A mud-covered street in Laqiha village, Baghlani Markazi district. AFP
A mud-covered street in Laqiha village, Baghlani Markazi district. AFP
Afghan men clear debris and mud from a house in Laqiha village. AFP
Afghan men clear debris and mud from a house in Laqiha village. AFP
Emergency personnel are searching for survivors. AP
Emergency personnel are searching for survivors. AP
An Afghan man stands near his flood-damaged home. The victims, mainly women and children, were killed when flash floods hit five districts of Baghlan province. AP
An Afghan man stands near his flood-damaged home. The victims, mainly women and children, were killed when flash floods hit five districts of Baghlan province. AP
Afghan people gather along a flooded road in the Feroz Nakhchir district of Samangan province. AFP
Afghan people gather along a flooded road in the Feroz Nakhchir district of Samangan province. AFP
A man retrieves his belongings from his damaged home after heavy flooding in Baghlan province. AP
A man retrieves his belongings from his damaged home after heavy flooding in Baghlan province. AP
People clean up their damaged homes in Baghlan province. AP
People clean up their damaged homes in Baghlan province. AP
Afghan people gather along the road between Samangan and Mazar-i-Sharif following a flash flood in the Feroz Nakhchir district of Samangan province. AFP
Afghan people gather along the road between Samangan and Mazar-i-Sharif following a flash flood in the Feroz Nakhchir district of Samangan province. AFP
Afghan men clear debris and mud from a house in Laqiha village. Afghanistan, which had a relatively dry winter that made it more difficult for the soil to absorb rain, is highly vulnerable to climate change. AFP
Afghan men clear debris and mud from a house in Laqiha village. Afghanistan, which had a relatively dry winter that made it more difficult for the soil to absorb rain, is highly vulnerable to climate change. AFP
The aftermath of the flash floods in Logariha village in the Nahrin district of Baghlan province. AFP
The aftermath of the flash floods in Logariha village in the Nahrin district of Baghlan province. AFP

In the best-case lower emissions scenario, where all carbon pledges are fulfilled, the average flood hazard level is forecast to rise by 9 per cent between 2020 and 2100.

The more pessimistic prospect of higher carbon emissions showed flooding could increase 49 per cent by the end of the century.

In the next few decades, the projected increases in flood hazard were more modest.

Between 2020 and 2050, in a low carbon emissions scenario flood risk is anticipated to grow 7 per cent with this doubling to more than 15 per cent in a high carbon emissions model.

“It is important to note that these global averages result from predicted changes in hazard that have large geographical variations,” Dr Wing said.

“Some places will see their flood risk fall, while for others the increases will be many times larger than the global average even under a lower emissions scenario.”

Researchers found that coastal flooding remains a big problem regardless of whether all carbon emissions are met or not.

Even in a low emissions scenario, coastal flooding is forecast to almost double, increasing by 99 per cent by 2100, because of the lagged response of ocean sea level rise to warming.

Flooding caused by rainfall was found to be especially vulnerable to human-induced climate change. Whereas this type of flooding was shown to increase by 6 per cent by 2100 in a low emissions scenario, this increase grows to 44 per cent in a high emissions model.

Heavy rain causes floods in Riyadh – in pictures

Cars drive through standing water in Riyadh after strong winds and heavy rain overnight that flooded roads. All Photos: AFP
Cars drive through standing water in Riyadh after strong winds and heavy rain overnight that flooded roads. All Photos: AFP
A man covers his head as he crosses a flooded street in Riyadh
A man covers his head as he crosses a flooded street in Riyadh
A man surveys standing water as he attempts to drive along flooded roads in the kingdom
A man surveys standing water as he attempts to drive along flooded roads in the kingdom
Cars drive through standing water in Riyadh
Cars drive through standing water in Riyadh
Saudi Arabian authorities closed schools in several regions as flash floods inundated roads
Saudi Arabian authorities closed schools in several regions as flash floods inundated roads
The adverse weather was the latest instance of heavy rain disrupting life in the Gulf region
The adverse weather was the latest instance of heavy rain disrupting life in the Gulf region
Cars drive through standing water in Riyadh after strong winds and heavy rain overnight
Cars drive through standing water in Riyadh after strong winds and heavy rain overnight

The largest future increases in flooding are forecast to be around the world's coastlines and in tropical Africa and Asia, as well as significant changes to arid North Africa.

The likelihood of flood increases was most pronounced along the North Atlantic and Indian Ocean coasts, as well as for south-eastern Asia and the Pacific Islands.

“Undertaking this research project involved subjecting our findings to the most comprehensive benchmarking of global flood modelling yet published,” co-author Professor Paul Bates CBE, professor of hydrology at the University of Bristol Cabot Institute for the Environment and chairman and co-founder of Fathom, said.

“With the highest resolution results produced to date, we hope industries will derive value from our model for a range of additional use cases, such as protecting critical infrastructure from future flooding, helping insurers price premiums and meeting the requirements of climate regulations.”

Countries signed up to pledges to lower carbon emissions at Cop27 and the study found that if these are not all achieved on time and in full, flooding levels look set to increase.

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Power: 201hp at 5,200rpm

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Fuel consumption: 8.7L/100km

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On sale: now 

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if you go

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Etihad and Emirates fly direct from the UAE to Seoul from Dh3,775 return, including taxes

The package

Ski Safari offers a seven-night ski package to Korea, including five nights at the Dragon Valley Hotel in Yongpyong and two nights at Seoul CenterMark hotel, from £720 (Dh3,488) per person, including transfers, based on two travelling in January

The info

Visit www.gokorea.co.uk

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A 680ml can of Arizona Iced Tea costs just Dh6.

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Results

5pm: Wadi Nagab – Maiden (PA) Dh80,000 (Turf) 1,200m; Winner: Al Falaq, Antonio Fresu (jockey), Ahmed Al Shemaili (trainer)

5.30pm: Wadi Sidr – Handicap (PA) Dh80,000 (T) 1,200m; Winner: AF Majalis, Tadhg O’Shea, Ernst Oertel

6pm: Wathba Stallions Cup – Handicap (PA) Dh70,000 (T) 2,200m; Winner: AF Fakhama, Fernando Jara, Mohamed Daggash

6.30pm: Wadi Shees – Handicap (PA) Dh80,000 (T) 2,200m; Winner: Mutaqadim, Antonio Fresu, Ibrahim Al Hadhrami

7pm: Arabian Triple Crown Round-1 – Listed (PA) Dh230,000 (T) 1,600m; Winner: Bahar Muscat, Antonio Fresu, Ibrahim Al Hadhrami

7.30pm: Wadi Tayyibah – Maiden (TB) Dh80,000 (T) 1,600m; Winner: Poster Paint, Patrick Cosgrave, Bhupat Seemar

Updated: August 21, 2024, 8:00 AM`
Climate changeEnvironmentCop27Weather