Emergency teams on Friday kept up their search for the thousands still listed as missing from the tsunami-sized flash flood that swept the Libyan port city of Derna, killing at least 4,000 people.

The enormous surge of water burst two upstream dams late Sunday and reduced Derna to an apocalyptic wasteland where entire city blocks and untold numbers of people were washed into the Mediterranean.

Calling the situation “catastrophic”, the United Nations launched an appeal for more than $71 million to respond to the “most urgent needs of 250,000 people targeted out of the 884,000 people estimated to be in need”.

An AFP journalist in Derna said central neighbourhoods on either side of the river, which normally dries up at this time of year, looked as if a steam roller had passed through, uprooting trees and buildings and hurling vehicles onto the port’s breakwaters.

“Within seconds the water level suddenly rose,” recounted one injured survivor who said he was swept away with his mother in the late-night ordeal before they both managed to scramble into an empty building downstream.

“The water was rising with us until we got to the fourth floor, the water was up to the second floor,” the unidentified man said from his hospital bed, in testimony published by the Benghazi Medical Center.

“We could hear screams. From the window, I saw cars and bodies being carried away by the water. It lasted an hour or an hour and a half — but for us, it felt like a year.”

– Seven-metre wave –
Hundreds of body bags now line Derna’s mud-caked streets, awaiting mass burials, as traumatised and grieving residents search mangled buildings for missing loved ones and bulldozers clear streets of debris and mountains of sand.

In one shattered home, a rescue team pumped out the water to reveal a woman’s lifeless arms still clutching her dead child, the AFP journalist reported.

“This disaster was violent and brutal,” said Yann Fridez, the head of the Libya delegation of the International Committee of the Red Cross, which had a team in Derna when the floodwaters hit.

“A wave seven metres (23 feet) high wiped out buildings and washed infrastructure into the sea. Now family members are missing, dead bodies are washing back up on shore and homes are destroyed.”

Abdelaziz Bousmya, who lives in the Chiha neighbourhood which was spared by the wall of water that devastated lower-lying districts, estimates that at least a tenth of the city’s population of 100,000 were killed.

“I lost my friends, my loved ones — they are all either buried under the mud or got swept out to sea by the floodwaters,” the 29-year-old said.

The floods were caused by hurricane-strength Storm Daniel, compounded by the poor infrastructure in Libya, which was plunged into turmoil after a NATO-backed uprising toppled and killed longtime dictator Moamer Kadhafi in 2011.

Libya is now divided between two rival authorities — the UN-backed, internationally recognised government in Tripoli, and an administration based in the disaster-hit east.

– ‘Sea corridor’ –
UN World Meteorological Organization chief Petteri Taalas said many deaths could have been avoided if early warning and emergency management systems had functioned properly in the war-scarred country.

With better coordination, “they could have issued the warnings and the emergency management forces would have been able to carry out the evacuation of the people, and we could have avoided most of the human casualties,” said Taalas.

Access to Derna remains severely hampered as roads and bridges have been destroyed and power and phone lines cut to wide areas, where at least 30,000 people are now homeless.

The United Nations said that “with the collapse of most roads, the municipality (of Derna) is urging relevant authorities to establish a sea corridor for emergency relief and evacuations.”

Climate experts have linked the disaster to the impacts of a heating planet, combined with Libya’s decaying infrastructure.

Storm Daniel gathered strength during an unusually hot summer and earlier lashed Turkey, Bulgaria and Greece, flooding vast areas and killing at least 27 people.

“Storm Daniel is yet another lethal reminder of the catastrophic impact that a changing climate can have on our world,” said UN rights commissioner Volker Turk.

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