A danger or risk

A natural hazard is a natural phenomenon that might have a negative effect on humans or the environment.

A hazard is an object, situation or behavior that has the potential to cause harm

geophysical (earthquakes, landslides, tsunamis and volcanic activity), hydrological (avalanchesand floods), climatological (extreme temperatures, drought and wildfires), meteorological (cyclones and storms/wave surges) or biological (disease epidemics and insect/animal plague)

earthquakes, drought, cyclones, tornadoes

the main risks as loss of property or injuries to people

An earthquake is the shaking of the Earth when the wind is very strong

An earthquake is the tremble of the surface of the Earth when a huge tsunami hits the shore

An earthquake is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves