Thunderstorms and Flash Floods Hit Libya: Why Water Can Arrive Far from the Rain
From September 18 to 26, strong storms shifted from northwestern and central Libya toward the southwest, causing runoff through dry valleys, flash floods, and standing water. In arid terrain, danger can travel down a channel from rain that fell far away, making early warnings especially important.
Nine days of severe weather
From September 18 to 26, thunderstorms and intense rain affected northwestern and central Libya before shifting southwest. WMO reported valley runoff, flash flooding, and standing water. Arid surfaces may absorb sudden rainfall poorly, while a dry channel can rapidly become a flow.
Distant rain, nearby flood
A dry valley’s catchment can begin many kilometers away. Rain upstream collects and moves downhill even when the local sky is clear. People should not cross moving water or remain in a channel and should reach higher ground when warned.
The review afterward
Weather and civil protection services can compare forecasts, warning times, and the water’s actual path: where messages arrived late, which road closed first, and which places became isolated. That turns one flood into a stronger future warning system.
Source: WMO.
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