Why did people use bomb shelters during world war 2?

Answer 1

If your city was being bombed (that's when airplanes ((airplanes are vehicles that can fly in the sky)) fly over your city and drop bombs ((bombs are usually metal encasing a series of explosives that when set off create a large and destructive explosion)).) you could go and hide (hiding is when you try to not be seen by whatever you are hiding from) in the bomb shelter and not die.

Answer 2

World War 2 saw extensive, brutal bombings of almost all of Europe's major city centers. These indiscriminate bombing raids killed untold millions of civilians.