町全体が

the entire town

→ 町
phrase Rare #41,986
the entire town 全体 means “whole” or “entire,” and が marks the town as the subject of the sentence.
JA: 町全体が静かだった。
EN: The entire town was quiet.

町全体が停電になった。

The entire town lost power.

町全体がとてもきれいだった。

The whole town was very clean.