An aerial view of the destruction caused by an earthquake and tsunami in Wani, Donggala, north of Palu, Central Sulawesi, Indonesia October 4, 2018. REUTERS/Darren Whiteside 

A aerial view of the destruction caused by an earthquake and tsunami in Wani, Donggala, north of Palu, Central Sulawesi, Indonesia October 4, 2018. REUTERS/Darren Whiteside 

A sofa is seen among the ruins of a house after an earthquake hit Balaroa sub-district in Palu, Indonesia, October 4, 2018. REUTERS/Beawiharta TPX IMAGES OF THE DAY 

A sofa is seen among the ruins of a house after an earthquake hit Balaroa sub-district in Palu, Indonesia, October 4, 2018. REUTERS/Beawiharta 

A burnt tree is seen among the ruins of houses after an earthquake hit Balaroa sub-district in Palu, Indonesia, October 4, 2018. REUTERS/Beawiharta 

Ruins of houses are seen after an earthquake hit the Balaroa sub-district in Palu, Indonesia, October 4, 2018. REUTERS/Beawiharta 

Soldiers stand next to a body bag containing a dead body after the earthquake and tsunami in Palu, Central Sulawesi, Indonesia, October 4, 2018. REUTERS/Athit Perawongmetha 

Damage properties are seen days after the earthquake and tsunami in Palu, Central Sulawesi, Indonesia, October 4, 2018. REUTERS/Athit Perawongmetha 

Local residents are seen in an area damaged by the earthquake and tsunami in Palu, Central Sulawesi, Indonesia, October 4, 2018. REUTERS/Athit Perawongmetha 

Local residents are seen in an area damaged by the earthquake and tsunami in Palu, Central Sulawesi, Indonesia, October 4, 2018. REUTERS/Athit Perawongmetha 

Debris and a ship are seen after the earthquake and tsunami hit an area in Donggala, Central Sulawesi, Indonesia, October 3, 2018. REUTERS/Athit Perawongmetha 

The damage after the earthquake and tsunami is pictured in Palu, Central Sulawesi, Indonesia, October 1, 2018. REUTERS/Athit Perawongmetha 

The damage after the earthquake and tsunami is pictured in Palu, Central Sulawesi, Indonesia, October 1, 2018. REUTERS/Athit Perawongmetha 

A villager worried about earthquake aftershock and tsunami carries a gallon of water to a temporary shelter atop a hill in Senggigi beach, Lombok Island, Indonesia, August 10, 2018. REUTERS/Beawiharta 

The Jefferson Memorial in Washington is pictured with the Tidal Basin and the Jefferson Memorial as thousands of tourists turned out to view cherry blossoms in Washington, DC, U.S. April 8, 2018. REUTERS/Will Dunham 

Residential houses and commercial buildings stand behind a seawall at a port in Miyako, Iwate Prefecture, Japan, March 2, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A seagull flies over a wave at Fudaihama beach in Fudai, Iwate Prefecture, Japan, March 1, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

The Aketo seawall which was damaged in the 2011 tsunami is seen in Tanohata village, Iwate Prefecture, Japan, March 1, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A wave breaks at Fudaihama beach in Fudai, Iwate Prefecture, Japan, March 1, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Large bags containing construction materials are placed at a construction site to reinforce and extend an old seawall in Tanohata village, Iwate Prefecture, Japan, March 2, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A high wave hits a seawall in Tanohata village, Iwate Prefecture, Japan, March 1, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A seawall under construction is surrounded by scaffolding in Tanohata village, Iwate Prefecture, Japan, March 1, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A woman walks on a road close to a seawall in Ofunato, Iwate Prefecture, Japan, March 3, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

The sun rises over a seawall at a beach in Kesennuma, Miyagi Prefecture, Japan, March 4, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A seawall is illuminated at night in Yamada village, Iwate Prefecture, Japan, March 2, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

'Miracle Pine', a tree which is said to symbolise hope and recovery after it survived the 2011 tsunami, stands next to a damaged building in front of the newly built seawall in Rikuzentakata, Iwate Prefecture, Japan, March 3, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON WALL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. 

Youths dive into a tidal pool as temperatures soar at Camps Bay beach in Cape Town, South Africa, December 11, 2016. REUTERS/Mike Hutchings 

A man who fell off a bridge while waiting to watch tidal wave struggles as waves come towards him, on the banks of Qiantang River in Hangzhou, Zhejiang province, China, July 25, 2016. Picture taken July 25, 2016. REUTERS/Chance Chan TPX IMAGES OF THE DAY

People stand along the waterfront as a wave crashes onto a seawall durng the rising tide in Saint Malo, March 21, 2015. Parts of the French coast will be on alert for the so-called "tide of the century", with tidal coefficients of 118 and 119 respectively on March 20 and 21. REUTERS/Stephane Mahe 

People stand along the waterfront as a wave crashes onto a seawall durng the rising tide in Saint Malo, March 21, 2015. Parts of the French coast will be on alert for the so-called "tide of the century", with tidal coefficients of 118 and 119 respectively on March 20 and 21. REUTERS/Stephane Mahe 

Poeple stand along the waterfront as a wave crashes onto a seawall durng the rising tide in Saint Malo, March 20, 2015. Parts of the French coast will be on alert for the so-called "tide of the century", with tidal coefficients of 118 and 119 respectively on March 20 and 21. REUTERS/Stephane Mahe 

Decontamination workers wearing protective suits and masks, remove radiated soil and leaves from a forest in Tomioka town, Fukushima prefecture, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant February 24, 2015. Many residents of Okuma, a village near the stricken Fukushima Daiichi plant, are angry about government plans to dump some 30 million tons of radioactive debris raked up after the March 2011 nuclear disaster in a sprawling waste complex on their doorstep. Few believe Tokyo's assurances that the site will be cleaned up and shut down after 30 years. In the four years since the disaster, Japan has allocated over $15 billion to lower radiation levels around the plant. Every day, teams of workers blast roads with water, scrub down houses, cut branches and scrape contaminated soil off farmland. That radiated trash now sits in plastic sacks across the region, piling up in abandoned rice paddies, parking lots and even residents' backyards. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY ENVIRONMENT TPX IMAGES OF THE DAY)

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The moon is seen behind lanterns released by survivors, local residents and visitors during the ceremony for victims of 2004 tsunami in Ban Nam Khem, a southern fishing village destroyed by the wave December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims gather along shorelines of the Indian Ocean on Friday for prayers and memorial services to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. In Thailand, where 5,395 people were killed, among them about 2,000 foreign tourists, commemoration ceremonies will be held in Ban Nam Khem. REUTERS/Athit Perawongmetha (THAILAND - Tags: SOCIETY CIVIL UNREST POLITICS ENVIRONMENT) 

Survivors, local residents and visitors release paper lanterns during a ceremony for victims of 2004 tsunami in Ban Nam Khem, a southern fishing village destroyed by the wave December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims gather along shorelines of the Indian Ocean on Friday for prayers and memorial services to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. In Thailand, where 5,395 people were killed, among them about 2,000 foreign tourists, commemoration ceremonies will be held in Ban Nam Khem. REUTERS/Athit Perawongmetha (THAILAND - Tags: SOCIETY CIVIL UNREST POLITICS ENVIRONMENT TPX IMAGES OF THE DAY) 

Visitors take pictures of the glowing names of tsunami victims at Aceh Tsunami Museum in Banda Aceh December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims cried and prayed as they gathered along Indian Ocean shorelines on Friday for memorials to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. Hundreds gathered in Indonesia's Aceh province, many bursting into tears as poems and songs were heard and a montage was screened showing the devastation from a disaster that killed 126,741 people in Aceh alone. REUTERS/Beawiharta (INDONESIA - Tags: DISASTER ENVIRONMENT ANNIVERSARY) 

Acehnese women read the Koran during prayers at a tsunami mass graveyard in Banda Aceh, December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims cried and prayed as they gathered along Indian Ocean shorelines on Friday for memorials to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. REUTERS/Beawiharta (INDONESIA - Tags: DISASTER ENVIRONMENT ANNIVERSARY RELIGION) 

A boy throws a rose into the sea near a monument for victims of the 2004 tsunami in Ban Nam Khem, a southern fishing village destroyed by the tsunami, December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims cried and prayed as they gathered along Indian Ocean shorelines on Friday for memorials to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. REUTERS/Athit Perawongmetha (THAILAND - Tags: DISASTER ANNIVERSARY ENVIRONMENT TPX IMAGES OF THE DAY) 

An Acehnese man cries while praying for a tsunami victim at a mass graveyard in Banda Aceh December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims cried and prayed as they gathered along Indian Ocean shorelines on Friday for memorials to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. REUTERS/Beawiharta (INDONESIA - Tags: DISASTER ANNIVERSARY TPX IMAGES OF THE DAY) 

Banlursak Watronnachai climbs a wave-shaped memorial to place flowers next to a plaque with the name of his wife, who was killed in the 2004 tsunami, in Ban Nam Khem, a southern fishing village destroyed by the wave, December 26, 2014. Survivors of Asia's 2004 tsunami and relatives of its 226,000 victims gather along shorelines of the Indian Ocean on Friday for prayers and memorial services to mark the 10th anniversary of a disaster that still leaves an indelible mark on the region. In Thailand, where 5,395 people were killed, among them about 2,000 foreign tourists, commemoration ceremonies will be held in Ban Nam Khem. REUTERS/Athit Perawongmetha (THAILAND - Tags: DISASTER ANNIVERSARY TPX IMAGES OF THE DAY) 

A worker looks at names of the 2004 tsunami victims on a wall at the Aceh Tsunami Museum during preparations for a ceremony in Banda Aceh December 25, 2014. On December 26, 2004, a magnitude 9.15 quake off the coast of Indonesia's Aceh province triggered an Indian Ocean tsunami that killed around 226,000 people in Indonesia, Sri Lanka, India, Thailand and nine other countries. REUTERS/Beawiharta (INDONESIA - Tags: DISASTER ENVIRONMENT ANNIVERSARY SOCIETY TPX IMAGES OF THE DAY) 

Personal possessions of 2004 tsunami victims are arranged to be photographed outside a police station in Takua Pa, in Phang Nga province December 19, 2014. Thai police opened a shipping container filled with documents and possessions of victims of the 2004 Indian Ocean Tsunami after being asked by Reuters for permission to film its contents. The three metre by 12 metre container was handed over to Thai police in 2011 and contains hundreds of plastic police evidence bags - each one holding the precious items found on the body of a victim. In Thailand, over 5,300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (DISASTER ENVIRONMENT SOCIETY ANNIVERSARY) 

Boxes with personal possessions of 2004 tsunami victims are put back into a container outside a police station in Takua Pa, in Phang Nga province December 19, 2014. Thai police opened a shipping container filled with documents and possessions of victims of the 2004 Indian Ocean Tsunami after being asked by Reuters for permission to film its contents. The three metre by 12 metre container was handed over to Thai police in 2011 and contains hundreds of plastic police evidence bags - each one holding the precious items found on the body of a victim. In Thailand, over 5,300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)

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Personal possessions of 2004 tsunami victims are arranged to be photographed outside a police station in Takua Pa, in Phang Nga province December 19, 2014. Thai police opened a shipping container filled with documents and possessions of victims of the 2004 Indian Ocean Tsunami after being asked by Reuters for permission to film its contents. The three metre by 12 metre container was handed over to Thai police in 2011 and contains hundreds of plastic police evidence bags - each one holding the precious items found on the body of a victim. In Thailand, over 5,300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (DISASTER ENVIRONMENT SOCIETY ANNIVERSARY TPX IMAGES OF THE DAY)

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A Buddha statue is left on a wall surrounding the former tsunami victims identification centre near Ban Nam Khem, a small fishing village on Thailand's Andaman Sea, December 12, 2014. Over 400 bodies of victims of the 2004 Indian Ocean Tsunami, including 369 still unidentified, are buried in the cemetery across the road from the former victims' centre where thousands were identified following the disaster. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY) 

Tourists walk behind a faded sign warning of tsunami hazard in Khao Lak, Phang Nga province December 15, 2014. Ahead of the anniversary of the 2004 tsunami, experts and officials say key weaknesses remain across the region in the system designed to warn people of the next disaster, and get them to safety. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)


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Pictures of victims are seen at the former tsunami victims identification centre near Ban Nam Khem, Phang Nga province, December 12, 2014. Over 400 bodies of victims of the 2004 tsunami, including 369 still unidentified, are buried in the cemetery across the road from the former victims' centre where thousands were identified following the disaster. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)


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An open metal coffin is seen as a worker paints flag poles at the Tsunami Victims Cemetery outside Ban Nam Khem, in Phang Nga province, December 12, 2014. Tsunami monuments are being refurbished and grass around victims' graves cut as Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)


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Gravestones are seen at the Tsunami Victims Cemetery near the former identification centre outside Ban Nam Khem, in Phang Nga province, December 12, 2014. Over 400 bodies of victims of the 2004 tsunami, including 369 still unidentified, are buried in the cemetery across the road from the former victims' centre where thousands were identified following the disaster. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)


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Buddhist monks look at the Thai navy police boat which was swept almost 2 km (1.2 miles) inland during the 2004 Indian Ocean Tsunami as they visit a memorial in Khao Lak, in Thailand's Phang Nga province, about 110 km (68 miles) north of the resort island of Phuket, December 14, 2014. On the day of tsunami, Thai navy boat 813 was on patrol about one nautical mile offshore serving as a guard to members of royal family staying at one of the resorts near-by. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY TPX IMAGES OF THE DAY)


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Foreign tourists walk on a small beach with fallen big trees and damage still visible from the 2004 tsunami in Khao Lak, in Phang Nga province, about 110 km (68 miles) north of the resort island of Phuket, December 14, 2014. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)

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Workers wearing radiation protective gear rest on a road at TEPCO's tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture, November 12, 2014. REUTERS/Shizuo Kambayashi/Pool (JAPAN - Tags: DISASTER ENERGY ENVIRONMENT TPX IMAGES OF THE DAY) 

Jamaliah (L) kisses her daughter Raudhatul Jannah, 14, as the girl's father Septi Rangkuti and grandmother Sarwani look on following prayers at Baiturrahman mosque in Banda Aceh August 8, 2014. Jamaliah told Reuters that Jannah, who was lost after being swept into the sea during the 2004 Indian Ocean tsunami, has been found alive and living with a foster mother. Jannah was reunited with her biological parents this week. REUTERS/Junaidi Hanafiah (INDONESIA - Tags: DISASTER TPX IMAGES OF THE DAY RELIGION)