What are the main obstacle the characters in hiroshima by john hersey face?

In "Hiroshima," the main obstacles faced by the characters include the immediate aftermath of the atomic bomb's devastation, which results in physical injuries, loss of loved ones, and overwhelming psychological trauma. They grApple with the struggle for survival amidst destruction, scarcity of resources, and the chaos of a city in ruins. Additionally, the long-term effects of radiation and the societal stigma surrounding the survivors further complicate their recovery and reintegration into normal life. Together, these challenges highlight the profound impact of nuclear warfare on human lives.