Fallout by todd strasser

This alternative history is set during the Cold War in 1962.  Nuclear bombs are actually dropped on the USA!  Scott, the story's protagonist, is safe as his parents are the only adults in his neighborhood who took the threat of nuclear war seriously and built a fallout shelter under their house.   But how safe can he REALLY be when his neighbors are determined to find a way in?  When water and food are in short supply?  When his Mother is in desperate need of medical help?  And when the adults start to turn on one another?  Read this thriller and find out, although beware if you are claustrophobic, this is one dark and dangerous fallout shelter!