The purpose of a Fallout Shelter was to provide protection from the radioactive fallout resulting from a nuclear explosion. These shelters were intended to safeguard occupants from harmful radiation, as well as from the immediate effects of a nuclear blast.
Fallout Shelters were typically underground or built with thick walls to block radiation, and they were equipped with supplies, such as food, water, and medical kits, to support occupants during a potential extended stay following a nuclear attack. The construction and stockpiling of these shelters became especially popular during the Cold War era when fears of nuclear warfare and the potential for an atomic bomb detonation were prevalent.