This is the 3123rd most frequent Japanese word.
全域
"Entire area" or "whole region."
Here, '全域' refers to the entirety of Tokyo, emphasizing that the typhoon's effects encompass all regions within Tokyo.
その台風は東京全域に影響を及ぼしました。
The typhoon affected the entire Tokyo area.
In this sentence, '全域' signifies the whole area of the park, illustrating that flowers cover every part of it.
公園全域が花で埋め尽くされています。
The entire park is filled with flowers.
For this example, '全域' denotes all parts of the mountainous area, suggesting a comprehensive exploration of the region.