flash flood
noun [ C ] uk/ˌflæʃ ˈflʌd/ us/ˌflæʃ ˈflʌd/
骤发的洪水,暴洪
a sudden and severe flood
The unusually heavy rain caused flash floods in several mountain villages. 罕见的大暴雨导致几处山村骤发洪水。
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