The millions of war workers lived in boomtowns, instant cities raised beside shipyards and aircraft plants with federal money. Strangers shared beds in shifts, water and schools buckled, and the places were overcrowded, hastily built, segregated and treated as disposable. Vanport, Oregon, home to forty thousand, was swept away by a flood in an afternoon in 1948, while Marin City survived.
Vanport figures are standard estimates, and the flood was a real disaster compounded by officials' assurances that the dikes were safe. Not every boomtown vanished, and segregation varied by site.