If a natural disaster occurs it is highly unlikely you would need to call anyone.
A tornado is both. A calamity is a disaster. A tornado is a disaster that occurs naturally, and would thus be consideted a natural calamity or natural disaster.
its called an aftershock
because it occurs naturally.
flooding
After a natural disaster occurs in a healthy ecosystem, secondary succession will cause the ecosystem to return to its original Climax Community.
Mainly floods and droughts.
national guard
earthquake and related tsunami.
The Correct answer is Flooding
hurricane
There is no prevention for this as it occurs inside the earth and we cannot have a control on it.
The natural disaster that takes place in the lithosphere is Earthquake.