Formation of Cyclone.
When water takes up heat from the atmosphere to change it into vapours for the formation of cloud. These water vapours cool and condense to form raindrops and release the absorbed heat. This heat causes the surrounding air to heat up and form a low pressure area. A strong wind blows towards this low pressure center. This action is repeated several times to form a low pressure area and dense clouds from the center of a strong wind.
Many layers of high winds begin to revolve around the low pressure center. This condition is called a cyclone. Center of the storm is a quiet area called the Eye of cyclone. The area of the eye is free from clouds. Outside the Eye is a circle of clouds and thunderstorms. The wind blows here at a speed of 150 to 250 kilometre per hour.
Destruction caused by cyclone in Odisha. A very strong cyclone strike to Indian state Odisha on 18 October, 1999. The speed of this cyclone was 200 km/h and it destroyed 45000 houses leaving 70,000 people homeless. Again on 29th October 1999 a cyclone hits Odhisa with a speed of 260 km/h accompanied by 9 meter high wave. Many people lost their lives and property worth of crores was destroyed.
