So this is a thread about the flooding in Libya;
https://www.bbc.co.uk/news/live/world-africa-66805748https://eos.org/thelandslideblog/the-failed-dams-in-wadi-derna-in-libyaAt least 11,000 people were killed, the death toll predicted as high as 20,000, mostly in the city of Derna in Libya
Two dams burst from the torrential rains, the Al-Bilad dam and Abu Mansour dam, constructed of a core compacted clay earth encased in stone, made in the 1970s by Yugoslavian contractors. The first smaller dam was upstream of the larger dam, leading to a cascading collapse, and lower dam was located less than half a mile from the city border, meaning the entirety of the city was in the floodplain, on a flat surface, with nowhere for water to disperse before destroying the town. Then came the
6.7 inches of rain in a tropical storm with floodwaters as high as 10 feet, when even a half foot of water moving swiftly is enough to be life threatening and knock people down. Naturally Libya is a country without a functional government and means to maintain and rebuild infrastructure in the aftermath of the Arab Spring and US invasion, to the point we can't even know for sure how deficient the dams were prior to bursting because nobody was checking on them.
With a population of ~85,000, a significant percent of the entire population of the town was killed and approximately a quarter of all the buildings swept away, let alone those damaged.