Disaster (noun)

1. An event causing great damage, destruction, and distress, such as a serious accident, a fire, or a natural catastrophe.
2. A sudden event, such as an accident or a natural catastrophe, that causes great damage or loss of life.
3. A state of extreme adversity or ruin.
4. An event or situation that has had a disastrous effect.
5. A sudden and terrible event or accident.

Origin:

Early 17th century: from italian disastro, from dis- (expressing reversal) + astro "star" (from the notion of an adverse star or fate), on the pattern of malcontento.

Examples:

1. The hurricane was a disaster for the coastal towns.
2. The disaster left thousands homeless.
3. The explosion was a major disaster.
4. The financial crisis was a disaster for many people.
5. The disaster resulted in a widespread power outage.