Natural Hazards

4. a storm of heavy hail.
6. a long, high sea wave caused by an earthquake or other disturbance.
7. a loud rumbling or crashing noise heard after a lightning flash due to the expansion of rapidly heated air.
9. a sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth's crust or volcanic action.
10. the point on the earth's surface vertically above the focus of an earthquake.
12. the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.
13. an elastic wave in the earth produced by an earthquake or other means.
16. a violent disturbance of the atmosphere with strong winds and usually rain, thunder, lightning, or snow.
17. a collapse of a mass of earth or rock from a mountain or cliff.

1. a fire in scrub or a forest, especially one that spreads rapidly.
2. A numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
3. a prolonged period of abnormally low rainfall, leading to a shortage of water.
4. a prolonged period of hot weather.
5. A numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
8. the condensed moisture of the atmosphere falling visibly in separate drops.
11. a sudden local flood, typically due to heavy rain.
12. the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.
14. a system of winds rotating inwards to an area of low barometric pressure, with an anticlockwise (northern hemisphere) or clockwise (southern hemisphere) circulation; a depression.
15. an overflow of a large amount of water beyond its normal limits, especially over what is normally dry land:
18. he occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder: