These initial shelters were about protecting people from the blast, with little thought given to how the surviving occupants would persevere in the post-war radioactive wasteland. By the late 1950s, it became clear that, thanks to fallout, surviving the initial blast wouldn't be enough for anyone hoping to outlive World War III. This 1959 shelter housed 40 occupants for 24 hours underground in Arizona, with some thought paid to filtering the air. By September of that year, we were looking at how a family of four might equip a "compulsory fallout shelter," and imagined that a 49 feet2 area could work, complete with "beds, food, water, sanitation facilities, lighting and a radio." There's even the suggestion that tape-players play familiar sounds, like a refrigerator running, and that they paint the ceiling blue to remind them of the sky. It's grim, but this design is only considered for five days, tops.