A natural disaster: a catastrophe caused by natural forces (e.g., earthquakes, typhoons, floods), not by human intent.
昨年の台風は大きな自然災害となり、多くの家屋が被害を受けた。
Last year's typhoon became a major natural disaster, and many houses were damaged.
自然災害に備えて、定期的に避難訓練を行っている。
We conduct regular evacuation drills to prepare for natural disasters.
地震は突然起きるため、自然災害対策が重要だ。
Because earthquakes occur suddenly, measures against natural disasters are important.