Flood Libya

2023 Storm Daniel — Derna Dam Floods

Mediterranean storm caused two dams above Derna to collapse, washing entire districts into the sea.

Figure uncertainty: Confirmed ~5,900 with thousands still missing; early estimates ranged up to 20,000.

Background from Wikipedia

The Derna dam collapses were the catastrophic failures of two dams in Derna, Libya, on the night of 10–11 September 2023, in the aftermath of Storm Daniel. The collapse of the Abu Mansour Dam and the Derna Dam released an estimated 30 million cubic meters of water, causing flooding downstream as the Wadi Derna overflowed its banks. The floods partially destroyed the city of Derna. The official death and missing persons toll was over 7,800 according to government figures, however, unofficial estimates of the death toll and missing were higher. The event was the second-deadliest dam failure in history, after the 1975 Banqiao Dam failure in China.

From the Wikipedia article “Derna dam collapses”, available under CC BY-SA 4.0. Wikipedia's figures may differ from the sources cited on this page.

Satellite before and after

Sources & references

Impact figures

Fatalities5,900
People affected880,000
RegionDerna

Figures per cited sources; estimates for older events vary.

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

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