In many different countries all over the planet, the number 13 is really thought to be a very unlucky one. People think that it brings diseases, unhappiness and weather disasters, for instance, tornados, floods and abnormal temperature falls and rises.
As a rule, in their ordinary life they are trying to avoid it.
Let’s see some examples.
In France, you can’t find a flat or a house with number 13 on it. You can check it, if you don’t still believe.
But it is not everything. In the US, modern American high-rise buildings don’t have the floor of number 13. Usually 12 follows 14. Of course, it seems like a legend, indeed there is, but still they believe in it.