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cyclone are: NATURAL HAZARDS AND DISASTERS Figure . : Tropical Cyclone Hazard Zones INDIA : PHYSICAL ENVIRONMENT Table . : Frequency of Cyclonic Storms in India Months Bay of Bengal Arabian Sea January ( . ) ∗ ( . ) February ( . ) ( . ) March ( . ) ( . ) April ( . ) ( . ) May ( . ) ( . ) June ( . ) ( . ) July ( . ) ( . ) August ( . ) ( . ) September ( . ) ( . ) October ( . ) ( . ) November ( . ) ( . ) December ( . ) ( . ) Total ( ) ( ) *Data in the brackets are in percentage to total number of storms taking place in a year It was mentioned that the energy to the tropical cyclone comes from the latent heat released by the warm moist air. Hence, with the increase in distance from the sea, the force of the cyclone decreases. In India, the force of the cyclone decreases with increase in distance from the Bay of Bengal and the Arabian Sea. So, the coastal areas are often struck by severe cyclonic storms with an average velocity of km/h. Often, this results in abnormal rise in the sea level known as Storm Surge . A surge is generated due to interaction of air, sea and land. The cyclone provides the driving force in the form of very high horizontal pressure-gradient and very strong surface winds. The sea water flows across the coast along with strong winds and heavy downpour.