A flood is an overflow of an expanse of water that submerges land.

Volcanoes can cause widespread destruction and consequent disaster through several ways. The effects include the volcanic eruption itself that may cause harm following the explosion of the volcano or the fall of rock. Second, lava may be produced during the eruption of a volcano.

An earthquake is the result of a sudden release of energy in the Earths crust that creates seismic wave

A natural disaster is the effect of a natural hazard (e.g.,flood, tornado, hurricane, volcanic eruption, earthquake, heatwave or landslide

This is a problem because if we don’t know what’s coming we cant stop it and so it will hurt people and cause damage to the city, country and sometimes the world.