The vast majority of tornadoes do not kill. Among those that kill, death tolls are usually no higher than 1 or 2. Most deaths in tornadoes, at least in the United States, are in homes. About 45% of US tornadic deaths are in mobile homes.
No, it is not safe to be in a fire chimney during a tornado. Tornadoes can cause structural damage that may compromise the chimney's stability, putting you at risk of injury or worse. It is safer to seek shelter in a designated tornado shelter or in a lower, windowless interior room in your home.
Mobile homes are very easy to be destroyed in severe weather like tornado. Among all people killed in tornado between 2000 to 2008, nearly half were killed in mobile homes. They can be easily destroyed by a comparitively weak tornado.
The police advised people to stay home during the tornado.
The Hallam, Nebraska tornado only killed 1 person.
You should not be in a mobile home if there is a tornado coming. Mobile homes are very susceptible to tornado damage and should be abandoned for sturdier shelter during a tornado warning.
People who are prepared for a tornado and know what to do are more likely to survive. Practicing tornado drills prepared people and helps tech them what to do in the event of a tornado. Tornadoes have killed people in schools, but fatalities can be averted if people follow the right procedures. A great example of this happened in Henryville, Indiana on March 2, 2012 when the school was struck by an EF4 tornado as students were leaving for home. While much of the school was destroyed and people were killed elsewhere, not a single death or injury occurred at the school thanks to well planned actions by the school staff.
People can limit tornado damage by building home to higher construction standards.
Leave the mobile home for a sturdy building or an underground shelter.
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in an underground basement
Any part of a home can be impacted by a tornado, depending on how strong it is. A weak tornado will probably not damage more than the exterior. The basement is the least likely part to be affected, but an EF5 tornado could easily remove a house from its foundation and expose the basement to the winds.
If you are in a mobile home and a tornado is coming you should leave and find a sturdier structure nearby, preferably one with a basement or cellar. Some trailer parks in tornado-prone areas have communal underground storm shelters that you can go to.