As Cold War tension regarding the threat of Soviet nuclear attack rose in the 1950s, children learned to duck and cover under their school desks and many families across the country built fallout shelters in their basements and backyards.
Community shelters were constructed beneath municipal buildings, and emergency government bunkers were carved into hillsides.
Source: History.com
https://www.realtor.com/news/trends/doomsday-survival-shelters-market/
https://timeline.com/pictures-nuclear-fallout-shelters-e524e17bce14
re: my good friend Doug’s recommended links posted above:
These are FASCINATING (and a bit eerie) pix of 1950s families in their fallout shelters