Asylum-seeking migrant families from Nicaragua pray as they arrive to the riverbank of the Rio Grande river after crossing into the United States from Mexico in Roma, Texas, U.S., June 10, 2021. Picture taken June 10, 2021. REUTERS/Go Nakamura

Asylum-seeking migrant families prepare to disembark an inflatable raft as they arrive to the riverbank of the Rio Grande river after crossing into the United States from Mexico in Roma, Texas, U.S., June 10, 2021. Picture taken June 10, 2021. REUTERS/Go Nakamura

A woman picks up plastic cups along the riverbank of Pasig river, in Manila, Philippines, June 10, 2021. REUTERS/Lisa Marie David

A general view of houses situated along the riverbank of Pasig river, in Manila, Philippines, June 10, 2021. REUTERS/Lisa Marie David

A boy reacts as dogs play along the riverbank of Pasig river, in Manila, Philippines, June 10, 2021. REUTERS/Lisa Marie David

Residents spend time along the riverbank of Pasig river, in Manila, Philippines, June 10, 2021. REUTERS/Lisa Marie David

Asylum-seeking migrants' families arrive at the Rio Grande riverbank on an inflatable raft after crossing into the United States from Mexico in Roma, Texas, U.S., June 9, 2021. Picture taken June 9, 2021. REUTERS/Go Nakamura

Asylum-seeking migrants' families arrive at the Rio Grande riverbank on an inflatable raft after crossing into the United States from Mexico in Roma, Texas, U.S., June 9, 2021. Picture taken June 9, 2021. REUTERS/Go Nakamura

Asylum-seeking migrants' families arrive at the Rio Grande riverbank on an inflatable raft after crossing into the United States from Mexico in Roma, Texas, U.S., June 10, 2021. REUTERS/Go Nakamura

Asylum seeking migrants from Central America navigate the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

Jocelyn, a three year old asylum seeking migrant from Honduras, is held by her mother as she navigates the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

A raft full of asylum-seeking migrants from Central America approaches the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

Asylum-seeking migrants' families sit at the riverbank after crossing the Rio Grande river into the United States from Mexico in Roma, Texas, U.S. May 5, 2021. REUTERS/Go Nakamura

Asylum-seeking migrants' families sit at the riverbank after crossing the Rio Grande river into the United States from Mexico in Roma, Texas, U.S. May 5, 2021. REUTERS/Go Nakamura

An asylum-seeking migrant boy stands by his mother at the riverbank after crossing the Rio Grande river into the United States from Mexico in Roma, Texas, U.S. May 4, 2021. Picture taken May 4, 2021. REUTERS/Go Nakamura TPX IMAGES OF THE DAY

An asylum-seeking migrant mother carries her daughter at the riverbank after crossing the Rio Grande river into the United States from Mexico in Roma, Texas, U.S. May 4, 2021. Picture taken May 4, 2021. REUTERS/Go Nakamura

General view of Myanmar's Ee Thu Hta displacement camp on the Thanlwin, also known as Salween, riverbank seen from Mae Hong Son province, Thailand, April 29, 2021. REUTERS/Athit Perawongmetha

General view of Myanmar's Ee Thu Hta displacement camp on the Thanlwin, also known as Salween, riverbank seen from Mae Hong Son province, Thailand, April 29, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops are seen after setting fire to a building inside a Myanmar army outpost near the Thai border, which is seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Ethnic minority Karen troops are seen after setting fire to a building inside a Myanmar army outpost near the Thai border, which is seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops approach a Myanmar army outpost near the Thai border, which is seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops are seen after setting fire to a building inside a Myanmar army outpost near the Thai border, which is seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha REFILE - CORRECTING ACTION

Ethnic minority Karen troops approach a Myanmar army outpost near the Thai border, as seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops approach a Myanmar army outpost near the Thai border, as seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops approach a Myanmar army outpost near the Thai border, which is seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Ethnic minority Karen troops approach a Myanmar army outpost near the Thai border, as seen from the Thai side on the Thanlwin, also known as Salween, riverbank in Mae Hong Son province, Thailand, April 28, 2021. REUTERS/Athit Perawongmetha

Asylum-seeking migrants' families stand on the riverbank of the Rio Grande river as they get ready to cross into the United States from Mexico in Ciudad Miguel Aleman, Mexico, as seen from Roma, Texas, U.S. April 8, 2021. Picture taken April 8, 2021. REUTERS/Go Nakamura

An asylum-seeking migrant carries two girls while walking in the water as Texas Ranger officers await at the riverbank after migrants crossed the Rio Grande river on an inflatable raft into the United States from Mexico in Roma, Texas, U.S. April 5, 2021. Picture taken April 5, 2021. REUTERS/Go Nakamura

Texas Senators Ted Cruz and John Cornyn and other members of a Republican delegation tour a section of the U.S.-Mexico border on a Texas Highway Patrol vessels as members of the media record from the riverbank in Mission, Texas, U.S., March 26, 2021. REUTERS/Go Nakamura

Devotees offer prayers to the setting sun during the "Chhat" festival at a swimming pool as mass gatherings are not allowed along the riverbanks amid concerns about the spread of the coronavirus disease (COVID-19) in Kathmandu, Nepal November 20, 2020. REUTERS/Navesh Chitrakar

Devotees offer prayers to the setting sun during the "Chhat" festival at a swimming pool as mass gatherings are not allowed along the riverbanks amid concerns about the spread of the coronavirus disease (COVID-19) in Kathmandu, Nepal November 20, 2020. REUTERS/Navesh Chitrakar

At an open-air, riverbank factory where the Blue Nile and White Nile meet in Sudan, Mohamed Ahmed al Ameen and his colleagues mould thousands of bricks every day from mud deposited by summer floods. "I consider the Nile something I have not parted with since I was born," Ameen said, as workers around him shaped bricks with blistered hands and laid them out to dry in the sun. "I eat from it, I farm with it. And I extract these bricks from it." But the labourers on Tuti Island in Sudan's capital Khartoum fear a giant dam Ethiopia is building close to the border between the two countries could endanger their livelihood. They worry the Grand Ethiopian Renaissance Dam upstream could weaken the Blue Nile's force, putting at risk an industry that locals say provided bricks for some of Khartoum's first modern public buildings around a century ago. Pottery makers, farmers and fishermen around the Nile's convergence share similar concerns, though other residents displaced by flooding last summer see benefit in a dam that will regulate the powerful river's waters. REUTERS/Zohra Bensemra. SEARCH "BENSEMRA NILE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: NILE-CONVERGENCE/ TEMPLATE OUT

Women take a walk, amid concerns about the spread of the coronavirus disease (COVID-19), at Han River park in Seoul, South Korea, April 23, 2020. REUTERS/Kim Hong-Ji

A girl reads a book on a riverbank, as the spread of the coronavirus disease (COVID-19) continues, in Whitmore, Staffordshire, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Carl Recine

A girl holds a book on a riverbank, as the spread of the coronavirus disease (COVID-19) continues, in Whitmore, Staffordshire, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Carl Recine TPX IMAGES OF THE DAY

A girl holds a book on a riverbank, as the spread of the coronavirus disease (COVID-19) continues, in Whitmore, Staffordshire, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Carl Recine

A girl reads a book on a riverbank, as the spread of the coronavirus disease (COVID-19) continues, in Whitmore, Staffordshire, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Carl Recine

A girl reads a book on a riverbank, as the spread of the coronavirus disease (COVID-19) continues, in Whitmore, Staffordshire, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Carl Recine

The banks of the river Rhine are pictured as the spread of the coronavirus disease (COVID-19) continues in Oestrich-Winkel near Ruedesheim, Germany April 5, 2020. REUTERS/Ralph Orlowski

The banks of the river Rhine are pictured as the spread of the coronavirus disease (COVID-19) continues in Oestrich-Winkel near Ruedesheim, Germany April 5, 2020. REUTERS/Ralph Orlowski

A man wearing a face mask walks on the Vltava riverbank across from Prague Castle in Prague, following the outbreak of coronavirus disease (COVID-19), Czech Republic, March 20, 2020. REUTERS/David W Cerny

A bird stands on closed Paris' antique bookseller or bouquiniste along the deserted banks of the river Seine at Saint Michel district in Paris as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in France, March 18, 2020. REUTERS/Christian Hartmann

A view shows closed Paris' antique booksellers or bouquinistes along the deserted banks of the river Seine in Paris as a lockdown is imposed to slow the rate of the coronavirus disease (COVID-19) in France, March 18, 2020. REUTERS/Christian Hartmann

The ruins of a monastery are seen after a riverbank collapsed into the water in Ta Dar U village, Bago, Myanmar, February 6, 2020. Photo taken on February 6, 2020. REUTERS/Ann Wang

Myo Zaw, 15, stands amid the ruins of a monastery after the riverbank is was located on collapsed into the water in Ta Dar U village,Bago, Myanmar, February 6, 2020. Photo taken on February 6, 2020. REUTERS/Ann Wang

Myo Zaw, 15, sits at the ruins of a monastery after the riverbank it was located on collapsed into the water in Ta Dar U village, Bago, Myanmar, February 5, 2020. Photo taken on February 5, 2020. REUTERS/Ann Wang

Myo Zaw, 15, and his father Aung So Oo, 45, stand at the ruins of a monastery after the riverbank it was located on collapsed into the water in Ta Dar U village, Bago, Myanmar, February 5, 2020. Photo taken on February 5, 2020. REUTERS/Ann Wang

The ruins of a monastery are seen after a riverbank collapsed in Ta Dar U village, Bago, Myanmar, February 5, 2020. Photo taken on February 5, 2020. REUTERS/Ann Wang

A tree is seen partially submerged in water after a riverbank collapsed in Ta Dar U village, Bago, Myanmar, February 5, 2020. Photo taken on February 5, 2020. REUTERS/Ann Wang

A vessel with a drawing of a snake is pictured on the bank of the Hanumante River during the final day of the month-long Swasthani Brata Katha festival in Bhaktapur, Nepal February 9, 2020. REUTERS/Navesh Chitrakar

A gold dredge is seen at the banks of Uraricoera River during Brazil's environmental agency operation against illegal gold mining on indigenous land, in the heart of the Amazon rainforest, in Roraima state, Brazil April 15, 2016. Picture taken April 15, 2016. REUTERS/Bruno Kelly

Houses are seen on the Onyar river during the storm "Gloria" in Girona, Spain, January 22, 2020. REUTERS/Nacho Doce

People walk across a snow-covered riverbank in Tongjiang, Heilongjiang province, China January 1, 2020. Picture taken January 1, 2020. REUTERS/Aly Song

A cross is set on the shallow water of the Volga river for celebrations of the Orthodox Christian feast of Epiphany in Volgograd, Russia January 19, 2020. REUTERS/Kirill Braga

Pigeon breeder Chen Jin-wen releases one of his racing pigeons by a riverbank, in the agricultural Annan district in a southern Taiwan's city of Tainan January 6, 2020. Picture taken January 6, 2020. REUTERS/James Pomfret

View of Hasankeyf, which will be significantly submerged by the Ilisu Dam, with the new Hasankeyf in the background in the southeastern town of Hasankeyf, Turkey, October 3, 2019. Picture taken October 3, 2019. REUTERS/Sertac Kayar

The Rio Grande de Loiza is seen as Tropical Storm Karen approaches in Loiza, Puerto Rico September 24, 2019. REUTERS/Ricardo Arduengo

Boxing - Regis Prograis & Josh Taylor Press Conference - Park Plaza London Riverbank, London, Britain - September 9, 2019 Dereck Chisora poses for a photograph after the press conference Action Images via Reuters/Tony O'Brien

Boxing - Regis Prograis & Josh Taylor Press Conference - Park Plaza London Riverbank, London, Britain - September 9, 2019 Dereck Chisora poses for a photograph after the press conference Action Images via Reuters/Tony O'Brien

Boxing - Regis Prograis & Josh Taylor Press Conference - Park Plaza London Riverbank, London, Britain - September 9, 2019 Promoters David Haye and Eddie Hearn speak with Dereck Chisora during the press conference Action Images via Reuters/Tony O'Brien