Extreme weather: What causes flash flooding?

Flash flooding affects cities across เล่นเกมสล็อต roma แบบ ทดลองไม่ต้องสมัคร the world and has become more common because of climate change.

Parts of London and the south of England were left underwater after heavy rain in July.

What is flash flooding?
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.

Floods can affect key public infrastructure including transport networks and hospitals. In London, some hospitals had to ask patients to stay away after they lost power.

Why does it happen in cities and towns?
Urban areas are more likely to experience this type of "surface water" flooding because they have a lot of hard surfaces - everything from paved front gardens to roads, car parks and high streets.

When rain hits them it can't soak into the ground as it would do in the countryside.

An example was seen when New York City was hit by Storm Elsa in July, flooding the subway system.