A fire destroyed four units and displaced seven people in Atascadero on July 21.My mother couldve very well died in that apartment; my nephew couldve maybe never seen adulthood, because that smoke was already entering the home, said Denise Singleton, the daughter of one of the displaced tenants.Singletons 70-year-old medically fragile mother, Debbie King, and her 14-year-old nephew, Zane, were inside their upstairs apartment on Robles Avenue whe…