Concrete is incredibly strong in most cases. We see it used it in so many facets of our life, we naturally assume it must be the safest material available. There is no shortage of examples where concrete has been intended for burial. Drainage pipes and storm drains, home basements and foundations and yes ; even shelters. However, when building structures intended for burial, concrete may not be your best choice. There is also no shortage of examples of concrete failing due to shifting earth and changing temperatures.