鉄てっ砲ぽう水みず

noun

flash flood

A sudden, violent flood, often caused by heavy rain in mountainous areas or upstream. Used in weather reports and disaster contexts.

• 昨さく夜やの大おお雨あめで鉄てっ砲ぽう水みずが発はっ生せいし、川かわ沿ぞいの家いえが流ながされた。

  A flash flood occurred due to last night's heavy rain, and houses along the river were swept away.

• 山やまでは鉄てっ砲ぽう水みずに注ちゅう意いしてください。

  Be careful of flash floods in the mountains.