Tropical cyclones are characterized as being a change formed by low atmospheric air pressure.
Cyclones, hurricanes, typhoons, tropical storms and tornadoes are some similar phenomena, all of which are formed from water heating and are always related to very heavy rains and intense bursts of wind. The difference between them is in which ocean they form, thus obtaining their singularities.
Tropical cyclones cause winds with speeds exceeding 200 kilometers per hour, are able to knock down trees, walls and walls, cars and people with enormous ease. They are also usually accompanied by heavy rainfall, which can lead to flooding and further destruction.
The wind whirlwinds seemingly come out of nowhere and revolve around a low-pressure center, they do not stop spinning until they lose their force, which can take more or less time depending on their category.
They begin over large masses of warm ocean waters, which generate a center of low atmospheric pressure, suitable for the development of cyclones. A lower atmospheric pressure, but with a higher temperature, combined with a closed circulation of winds with a hot core and the so-called “eye”, an even more intense part of the cyclone itself.
Tropical cyclones rotate counterclockwise in both the Southern and Northern hemispheres, reaching tropical regions near the Equator. Its force is motivated by the thermal energy originated by the humid air and also by the water vapor that condenses. That is, the hotter and wetter, the greater the fuel for the cyclone.
The rates of pressure variation of tropical cyclones are more intense than those of other similar phenomena, combining storms, winds and waves also stronger than most phenomena. When they reach the coastal regions, they lose their strength, precisely because of the decrease of heat and humidity.
Its measurement is determined by the distance from its center of wind circulation to where there is closed cyclonic circulation. Small, normal-sized and large dwarf cyclones can be considered.
Depending on the speed of the winds, they are included in the following categories:
– Category 1: winds of 118km/h and 152km/h
– Category 2: winds of 153km/h and 176km/h
– Category 3: winds of 177km/h and 208km/h
– Category 4: winds of 209km/h and 248km/h
– Category 5: winds above 249km/h
Of the major accidents caused by natural phenomena around the world, the largest occurred in Bangladesh, killing about 300,000 people in the year 1970. It was followed by Myanmar, causing 150,000 deaths.
Some places like the Philippines, China, Japan, Australia, Madagascar, Mexico, the United States and the Caribbean Islands are the region’s most prone to cyclones, some with more than 20 occurrences per year. In the routine sequence of the phenomenon, countries tend to prepare themselves in advance, trying to avoid the minimum of losses and deaths.
There are other countries that receive the cyclone eventually, with no exact prediction, which makes it difficult to prepare for when they actually arise. As a rule, they are more intense than most (occurring more frequently and are predicted), such as those caused in the Bay of Bengal.
In Brazil, the common is extratropical cyclone formations, much less intense than cyclones, mainly in the South. They do not usually surpass 100 km/h, but they provoke very strong waves.