Another theme might be the passage of time. Vaulted halls that are entombed often give a sense of a place that has been forgotten and left to the ravages of time. It could explore how time changes things, both physically and in terms of the memories or stories associated with the place.
A theme of mystery could also be present. The very idea of vaulted halls being entombed implies something hidden or unknown. There could be secrets within those halls, and the story might revolve around the characters trying to uncover these mysteries, whether they are related to the history of the place or something more supernatural.
I'm not sure as the title alone doesn't give much information about the characters. It could be a lone explorer who stumbles upon these vaulted halls. Maybe someone who is on a quest for knowledge or treasure and is the first to penetrate this entombed place.
Maybe it's associated with a group of early settlers. They could have built the vaulted halls to preserve their origin story, which was then entombed within. It might be a way for them to safeguard their heritage from invaders or the passage of time. The halls could be filled with items that represent their first days in the area, like tools they used, or stories written on primitive parchments.
Perhaps ancient artifacts or lost knowledge might be found there.
One possible theme could be heroism. There were many heroes on 9/11, from the firefighters who rushed into the burning buildings to the passengers on Flight 93 who fought back against the hijackers.
I don't have enough information to say exactly who Hudson and Halls are. They could be ordinary people whose love story is being told.
One possible theme could be love. In many short stories, love in various forms such as romantic love, platonic love or love for family is a common theme. Another theme might be self - discovery. The characters in the story could be on a journey to find out more about themselves. Also, it could be about survival, especially if the story is set in a difficult or dangerous situation.
Yes, it's possible. But it depends on the building's design and structural considerations.
One possible theme is survival. Homeless people have to fight every day just to stay alive, which could be a central theme.
One possible theme could be hope. Even in a short story, the characters might be facing difficult situations but still hold on to hope. Another could be change, as short stories often show how a character or a situation can transform in a short period.
Another theme could be resilience. Despite the unimaginable disaster, the survivors in Hiroshima showed great strength in rebuilding their lives and their city. The story might explore this aspect of human nature.