- 洪水猛兽 hóngshuǐměngshòu great scourgesomething extremely dangerous or threatening that causes great disaster; literally "severe floods and fierce beasts"
- 洪水位 hóngshuǐwèi flood levelThe water level reached by a river during a flood; a high water mark.
- 洪水期 hóngshuǐqī flood seasonthe period of time during the year when a river is most likely to flood; flood season
- 大洪水 dàhóngshuǐ delugegreat flood; deluge
- 洪水滔滔 hóngshuǐtāotāo flooding over a vast area(idiom) to have flood waters spreading wide and rushing over a vast area
