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- Flash floods usually happen during intense rainfall - when the amount of water is too much for drains and sewers to deal with. It can occur very quickly and without much warning. Roads can become unpassable - with vehicles abandoned - and homes and shops damaged by floodwater.
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Oct 5, 2021 · Flash floods usually happen during intense rainfall - when the amount of water is too much for drains and sewers to deal with. It can occur very quickly and without much warning. Roads can...
- What Are Flash Floods?
- What Causes Flash Floods?
- Case Study: Boscastle Floods in 2004
Flash flooding happens when rain falls so fast that the underlying ground cannot cope, or drain it away fast enough. Roads can become like rivers and if there is a lot of water, it can flood buildings and carry cars away. So, if the rain is falling too fast for the ground or drains to cope, there is a risk of flash flooding.
Most rivers flow fairly gently as they slope slowly towards the sea. Therefore, when a river floods it does so quite slowly as it takes time for the rain to percolate through the ground and into the rivers and out to sea, allowing time for some warning. With flash flooding, there is often very little time between the rain falling and flash flooding...
The village of Boscastle in Cornwall experienced flash flooding on 16 August 2004 when an exceptional amount of rain fell over eight hours. Heavy thundery showers developed over the moors to the southwest of Boscastle. A small, steep river flows through Boscastle and the thundery showers came one after another in a short space of time, over the sam...
Apr 16, 2024 · Flash floods are particularly dangerous due to their rapid onset and powerful force, often catching people off guard. Their unpredictability and ability to quickly overwhelm areas make flash floods one of the deadliest natural disasters.
Dec 6, 2019 · From Stirling to Sheffield, many parts of the UK in 2019 felt the impact of severe surface water flooding – often referred to as flash flooding – that followed torrential rain. As the...
Mar 7, 2023 · Flash floods are a growing threat in some of the world’s driest regions. Deluges can trigger sudden and rapid torrents of run-off that flow down dry river beds and rocky channels.
Aug 16, 2022 · Emergency street repairs had to be carried out in Sheffield after flash flooding. Homes were flooded and roads blocked at Totton, near Southampton. Residents had to have their homes pumped...
