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Flash floods kill more people than tornadoes, hurricanes or lightning.

暴雨造成的死亡人數比龍捲風、颶風或閃電還要多。

Flash flood creates a rush of moving water that can sweep a grown man office feet, the car off the road and even your entire home off its foundation.

閃電洪災產生的急速移動的水，可以席捲一個成年男子辦公室的腳，汽車離開道路，甚至你的整個家庭的基礎。

When the ground becomes so saturated that water can no longer seep into the soil, it begins to run off quickly into rivers and streams.

當地面變得非常飽和，以至於水無法再滲入土壤中時，水就開始迅速流向河流和溪流。

In This causes a rise in water in a flash, densely populated areas having extremely high risk of flash flooding with the additional concrete, unless grassy areas for the water to soak into the soil.

在這導致水在瞬間上升，人口密集的地區有極高的風險與額外的混凝土的山洪，除非草地上的水浸入土壤。

And they can see flash flooding very quickly in a mountainous terrain.

而且他們可以看到在山地裡很快就會發生山洪。

The combination of gravity, plus the easy runoff, can lead to catastrophic flooding.

地心引力的作用，再加上容易流淌的水，會導致災難性的洪水。

When all of that water is funneled into rivers, creeks and even the valleys, remember, flash flooding can happen in the blink of an eye.

當所有的水都被漏入河流、小溪甚至山谷時，請記住，山洪可能發生在眨眼之間。

That's why it's important to stay alert and pay attention in case a flash flood watch or warning is issued for your area.

所以，萬一你所在的地區發佈了山洪災害預警或警告，一定要保持警惕和注意。