A natural disaster such as an earthquake, typhoon, flood, etc.
最近の天災で多くの家屋が被害を受けた。
Many houses were damaged by recent natural disasters.
天災に備えて非常食や懐中電灯を準備しておこう。
Let's prepare emergency food and flashlights in case of natural disasters.
この地域は天災のリスクが高いとされている。
This area is considered to have a high risk of natural disasters.