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As you have now read, tornadoes are extremely dangerous disasters, The locations, the cause and the world's worst. Now you can be more prepared if there is a tornado near you.

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The world's worst tornado ever recorded was a tornado in Manikganj, Bangladesh. This tornado struck on the 26th of April 1989. An estimate of 1,300 people were killed and another 12,000 injured. After the tornado a guess of 80,000 people were now homeless. This isn't the only terrible tornado Bangladesh has had. Bangladesh is known for high death tolls from tornadoes.

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Although the United States sees the most tornadoes of any country in the world each year, it's not the location of the deadliest tornado in recorded history.

( INTERACTIVE: Tornadoes Around the World)

According to the World Meteorological Organization, the world's single deadliest tornado struck the Manikganj district of Bangladesh on April 26, 1989.

The violent tornado carved a path a mile wide and 10 miles long, destroying the towns of Manikgank Sadar and Saturia. An estimated 1,300 people were killed and an additional 12,000 injured.

All structures in a 2.3-square-mile-wide area were destroyed along a portion of the path of the tornado, which left an estimated 80,000 people homeless.

This isn't the only time Bangladesh has suffered a high death toll from tornadoes. Here's a few more examples:

More than 600 people were killed when a series of tornadoes tore through the Jamalpur and Tangail districts on May 13, 1996, according to Thomas Schmidlin and Yuichi Ono.

Four other tornado events since 1964 have killed more than 500 in Bangladesh (April 11, 1964, April 14, 1969, April 17, 1973, and April 1, 1977), according to Chris Burt of Weather Underground.

More recently, 69 people were killed by two tornadoes on April 14, 2004.

A total of 22 people were killed by a tornado on March 22, 2013.

For comparison, the deadliest tornado outbreak in U.S. history was on March 18, 1925, when 747 people lost their lives. Of this total, the Tri-State Tornado alone killed 695 people along its path across three states.

( MORE: 10 Worst U.S. Tornadoes)

Strongest Tornadoes Outside the U.S.

Tornadoes in Bangladesh are most common during the transition to the wet monsoon in the spring. The country's peak month for tornadoes is April, though its tornado season runs from March to May, according to Bangladeshtornadoes.org. Wind shear and instability are maximized during this time period as warm, moist air flows northward from the Bay of Bengal and combines with a westerly wind flow in the upper atmosphere.

Dr. Greg Forbes, The Weather Channel's severe weather expert, notes that Bangladesh experiences some of the strongest and deadliest tornadoes outside the U.S., possibly up to F4 or even F5 intensity. That said, according to this article by Paul and Bhuiyan, the country only averages more than six tornadoes per year. This is much less than the U.S. 10-year average of 1,294 tornadoes annually.

High death counts in past Bangladesh tornadoes are the result of a number of factors identified in a 1996 paper by Schmidlin and Ono. High population density, poor building construction and no warnings systems were just a few of the reasons cited.

Sadly, Bangladesh is also the country where the deadliest tropical cyclone in history struck. On Nov. 11, 1970, the "Bhola Cyclone" killed at least 300,000 people after it sent a 20- to 30-ft.-high storm surge into the low-lying Bangladesh coastline.

MORE ON WEATHER.COM: Deadly Bay of Bengal Tropical Cyclones

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The Deadliest Tornado in the World | The Weather Channel

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Although the United States sees the most tornadoes of any country in the world each year, it's not the location of the deadliest tornado in recorded history. ( INTERACTIVE: Tornadoes Around the World) According to the World Meteorological Organization, the world's single deadliest tornado struck the Manikganj district of Bangladesh on April 26, 1989.

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Some counties experience more tornadoes than others. Many countries have tornadoes, but here are a few that do get them. Argentina, Uruguay, Australia, Japan, China, Russia, Ukraine, Poland and Germany are some countries that don't get too many tornadoes, but their tornadoes are way more dangerous than the tornadoes most other countries get.

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Tornadoes can start when a storm provides warm air close to the surface and colder air above. The warm air is forced upwards and creates and even worse storm. For a tornado to form, the storm has to start rotating. This happens when the air near the ground moves in different directions than the air up the  top. This creates a tornado.

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We don't know if a particular storm will produce a tornado so the truth is we really don't know what causes a tornado. We do know the necessary conditions needed for tornado formation.

A tornado is a powerful column of winds that rotate around a center of low pressure. The winds inside a tornado spiral inward and upward, often exceeding speeds of 300 mph. For a thunderstorm to produce a tornado requires warm humid air near the surface with cold dry air above. These conditions make the atmosphere very unstable, in the sense that once air near the ground is forced upward, it moves upward quickly and forms a storm. Severe thunderstorm conditions also include a layer of hot dry air between the warm humid air near the ground and the cool dry air aloft. This hot layer acts as a lid that allows the sun to further heat the warm humid air - making the atmosphere even more unstable.

To form a tornado, the host thunderstorm must also rotate. From below, a rotating cloud base looks like someone is stirring the storm from above. This happens in a storm when wind at the ground is moving in a different direction and speed than the air above. The change in wind speed and direction with height is known as wind shear. This wind shear develops the rotation in the thunderstorm needed for tornado formation.

At this time of year, warm moist winds from the Gulf of Mexico move northward while above the jet stream warm dry winds from the Great Plains move eastward, providing the necessary conditions for severe thunderstorms.

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We don't know if a particular storm will produce a tornado so the truth is we really don't know what causes a tornado. We do know the necessary conditions needed for tornado formation. A tornado is a powerful column of winds that rotate around a center of low pressure.

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These whirling winds are               extremely dangerous towards humans, animals and vegetation. The categories vary from light, all the way up to devastatingly destructive. If you are caught in one of these rare occurrences, there will most likely be no escape.