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Natural disasters in Australia and their effects

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Introduction

Natural disasters in Australia and their effects Earthquakes are caused by the shifting of the Indian-Australian plate, which is being pushed north and is colliding with the Eurasian, Philippine and Pacific plates. The stress from this collision is released during earthquakes. Earthquakes can occur anywhere in Australia. Adelaide has the highest earthquake hazard of any capital city, with more earthquakes in the past 50 years than any other. Thunderstorms however are more common on the east coast of Australia. Thunderstorms develop when dense cold air meets warm, moist air, which is less dense. A trigger, such as solar heating can then begin the development of a thunderstorm. ...read more.

Middle

Cyclones are often confused for tornadoes, which are formed in a different way. Tornadoes form during thunderstorms when hot air meets cold air large amounts of wind can be produced by the warming and cooling of the air. A tornado can range in width from a few metres to several hundred metres in width. Tornadoes spin clockwise and contain winds that may reach more than 300 km/h. Thunderstorms can also cause flash flooding. Flash flooding occurs during thunderstorms. Moist air condenses when it reaches high attitudes. When rain drops become too large to be supported they are supposed to fall, but the intense winds and updraught of a severe storm can stop the rain from falling. ...read more.

Conclusion

Earthquakes damages property and can cause loss of life and injury. Droughts in both agricultural and pastoral areas have widespread effects including significant reduction of harvests, livestock losses and shortage of water in urban areas. All of these create extreme financial losses for farmers and rural workers can be economically devastating. Excessive amounts of rain, though rare, can also be damaging to agricultural areas. As mentioned above long, sustained periods of intense rainfall are rare, although very intense thunderstorms, often with hail, lasting only a few minutes can cause damage to crops and freshly cultivated soil. Thunderstorms can damage urban areas too, large hail stones can hit cars, buildings and even people. Flash flooding associated with these intense thunderstorms rarely lasts long, but the sudden rise in water levels damages property, and can cause injury and death. ...read more.

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