List of disaster twin films

Twin films are films with the same, or a very similar, plot produced or released at the same time by two different film studios.

The phenomenon can result from two or more production companies investing in similar scripts around the same time, resulting in a race to distribute the films to audiences.

Some attribute twin films to films dealing with topical issues, such as volcanic eruptions, earthquakes, terrorist attacks, or significant natural disasters, resulting in multiple discovery of the concept.

Examples
This list only focuses disaster films.