Torrential rain, loud explosions and burst dams.

With hundreds feared lifeless, Sky News appears at what might have triggered the devastating flood that worn out 1 / 4 of the japanese metropolis of Derna.

Satellite photographs present the Wadi Derna river, which runs from the mountains by the town and into the ocean, has been dry for many of the yr, although it floods semi-regularly when it rains.

But on Sunday night time, Storm Daniel pounded the coast and residents of Derna reported listening to loud explosions earlier than they realised dams exterior the town had collapsed, unleashing flash floods down Wadi Derna that finally crashed into the town.

Some 414mm of rain fell on the close by city of Bayda, in response to an area climate organisation, which the Sky News climate group described as a "huge amount of rainfall" that seemingly rapidly ran off fairly than soaked into the onerous dry floor.

The first dam is about 12km upstream from the town the place two river valleys converge, and photographs has proven it has been fully destroyed.

After breaching the primary dam, the floodwater would have continued downstream alongside the canyon in the direction of the second, which sits on the southern fringe of the town.

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Downstream of the second dam, a large torrent of water cascaded by the town centre, smashing into buildings on both facet.

Multi-storey condominium blocks that had been nicely again from the river had their facades ripped away and concrete flooring had collapsed, whereas vehicles lifted by the flood had been left stacked on prime of one another.

Read extra:Estimates counsel 2,000 could have died in Derna aloneLibya asks for worldwide assist after storm

Researcher warned repeated flooding threatened metropolis

Libya has been contorted by years of battle and lack of a central authorities after autocratic chief Muammar Gaddafi was toppled in a coup in 2011, which has left it with crumbling infrastructure that was weak to intense rains.

In a analysis paper revealed final yr, hydrologist Abdelwanees A R Ashoor of Libya's Omar al Mukhtar University warned repeated flooding of the seasonal riverbed, or wadi, was a menace to Derna, citing 5 floods since 1942.

His paper referred to as for rapid steps to make sure common upkeep of the dams and added: "If a huge flood happens the result will be catastrophic for the people of the wadi and the city."

The floods are probably the most deadly environmental catastrophe in Libya's trendy historical past and in addition hit different areas, together with the city of Bayda, the place round 50 individuals had been reported lifeless.

Hundreds of households had been additionally displaced and took shelter in colleges and different authorities buildings in Benghazi and elsewhere in japanese Libya.

The Data and Forensics group is a multi-skilled unit devoted to offering clear journalism from Sky News. We collect, analyse and visualise information to inform data-driven tales. We mix conventional reporting expertise with superior evaluation of satellite tv for pc photographs, social media and different open supply info. Through multimedia storytelling we purpose to raised clarify the world whereas additionally displaying how our journalism is finished.

Content Source: information.sky.com