NATURAL DISASTERS


ABOUT DISASTERS:

A natural disaster is a major adverse event resulting from natural processes of the Earth. Some of the natural disasters are floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, storms, and other geologic processes. A natural disaster is a major adverse event resulting from natural processes of the Earth. Many Natural disasters damage the environment and the people living in it. Natural disasters are caused due to different reasons like soil erosion, seismic activity, tectonic movements, air pressure, and ocean currents, etc.

TYPES OF NATURAL DISASTERS ARE:

Some of the different kinds of natural disasters are,

  • Earthquake:

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. When the rocks break, the earthquake occurs.

  • Floods:

The major cause of the flood is heavy rainfall. It can be also caused by the melting of snow and ice. It is also caused by Broken Dams.

  • Tsunami:

Tsunami is waves caused by a sudden movement of the ocean surface due to earthquakes, landslides on the seafloor, land slumping into the ocean, large volcanic eruptions, or meteorite impact in the ocean. When tsunami waves become extremely large in height, they savagely attack coastlines, causing devastating property damage and loss of life.

  • Tornadoes:

Tornadoes are caused by the thunderstorms being extremely large, unstable, and with wind shear in the lower region of the atmosphere. Tornadoes often damage power lines, gas lines, or electrical systems, there is a risk of fire, electrocution, or an explosion. Tornadoes can last from several seconds to more than an hour.

  • Volcanic eruption:

Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth’s mantle melts. Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another. Health concerns after a volcanic eruption include infectious disease, respiratory illness, burns, injuries from falls, and vehicle accidents related to the slippery, hazy conditions caused by ash. When warnings are been pay attention to, the chances of adverse health effects from a volcanic eruption are very low.

  • Landslide:

Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors. Slides can cause disastrous flooding, particularly when landslide dams across streams are breached, and flooding may trigger slides. A landslide can also block rivers and increase the risk of floods.

  • Hurricanes:

Hurricanes form over the warm ocean water of the tropics. When warm moist air over the water rises, it is replaced by cooler air. The cooler air will then warm and start to rise. This cycle causes huge storm clouds to form. The major effects of hurricanes are tornadoes, heavy rainfall, high winds, riptide, and death.

  • Thunderstorms:

Thunderstorms arise when layers of warm, moist air rise in a large, swift updraft to cooler regions of the atmosphere. Thunderstorms can bring heavy rains, strong winds, hail, lightning, and tornadoes. Severe thunderstorms can cause extensive damage to homes and property. Lightning is a major threat during a thunderstorm.

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