What we are seeing is well beyond the worst natural disaster in American history.

Planning needs to take account of the worst possible disaster.

It turned out to be one of the worst personal disasters in Met history.

And it had led to the worst military disaster in American history.

Wouldn't that have been an even worse disaster for him than what had actually happened?

It was the worst disaster in the history of nuclear energy production.

The fire, which killed 72 people including many government officials, was at the time the worst urban disaster in American history.

This was the worst 'natural disaster' in the city's history.

At that time, it was Mexico's worst natural disaster in recent times.

More than 60 million people died, making it the worst disaster of all time.