What is the difference between a natural disaster and a national disaster?

Here's the differentiation between the concepts: 1.1.1. Natural disaster: A natural disaster* is a major adverse event caused by natural processes of the Earth, such as earthquakes, floods, or hurricanes. These events are not a result of human actions. 1.1.2. National Disaster: A national disaster* is any disaster (natural or human-made) that is so severe it affects a significant portion of a country, requiring a coordinated national response. It implies a formal declaration by the national government due to its widespread impact. The core difference is that a natural disaster originates from nature, while a national disaster describes the extensive impact and national-level response required for any type of disaster.