disaster; tragedy; tragic incident; horrible accident
列車の脱線により大惨事が発生した。
A major disaster occurred due to a train derailment.
惨事の再発を防ぐため安全対策が強化された。
Safety measures were strengthened to prevent a recurrence of the tragedy.
惨事の凄まじさに現場の記者は絶句した。
Reporters at the scene were speechless at the horror of the disaster.