火ひの元もと

expression, noun

source of fire; place where fire could start

Refers to a potential fire hazard or the origin of a fire. Often used in safety contexts, such as checking 火の元 before leaving home or after a disaster.

• 寝ねる前まえに火ひの元もとを確かく認にんしてください。

  Please check for fire hazards before going to bed.

• 地じ震しんの後あとは火ひの元もとに注ちゅう意いが必ひつ要ようだ。

  After an earthquake, you need to be careful about potential fire sources.