A natural disaster is a major adverse event resulting from natural processes of the Earth; examples are floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, and other geologic processes

National securityis thesecurityof anation state, including itscitizens,economy, and institutions, which is regarded as a duty of government.

Originally conceived as protection againstmilitary attack, national security is now widely understood to include non-military dimensions, including the security fromterrorism,crime,economic security,energy security,environmental security,food security,cyber securityetc. Similarly, national security risks include, in addition to the actions of othernation states, action byviolent non-state actors,narcotic cartels, andmultinational corporations, and also the effects ofnatural disasters.

Governments rely on a range of measures, includingpolitical,economic, andmilitarypower, as well asdiplomacyto safeguard the security of the nation state. They may also act to build the conditions of security regionally and internationally by reducingtransnationalcauses of insecurity, such asclimate change,economic inequality,political exclusion, andnuclear proliferation.

Anaturalhazard is athreatof anaturallyoccurring event will have a negative effect on humans. This negative effect is what we call anaturaldisaster. In other words when the hazardousthreatactually happens and harms humans, we call the event anaturaldisaster.

A natural disaster is a major adverse event resulting from natural processes of the earth ;example are floods, hurricanes,tornadoes,volcanic eruptions and other geologic processes