N-UNCOUNT
洪水泛滥;水灾
If flooding occurs, an area of land that is usually dry is covered with water after heavy rain or after a river or lake flows over its banks.
例句
The flooding, caused by three days of torrential rain, is the worst in sixty-five years.
连续 3 天的倾盆大雨引发的洪水是 65 年来最严重的一次。