Question

what are disaster how are they classified

Answer 1

Disasters are classified in two types
(i) Natural disasters
(ii) Man made disasters

Examples of natural disaster are tsunami, earthquake, flood, draught etc
Examples of man made disasters are industrial disasters, conflicts, nuclear disasters, etc.

Answer 2

a sudden accident or a natural catastrophe that causes great damage or loss of life is called a disaster

These types of disasters include:

Tornadoes and Severe Storms.

Hurricanes and Tropical Storms.

Floods.

Wildfires.

Earthquakes.

Drought.