en_tn_condensed/isa/22/01.md

A declaration

"This is what Yahweh declares" or "This is Yahweh's message"

about the Valley of Vision

Here "Valley" refers to those who live in the valley, that is, Jerusalem. Alternate translation: "about those who live in the Valley of Vision" or "about those who live in Jerusalem" (See: rc://en/ta/man/translate/figs-metonymy)

What is the reason that you have all gone up to the housetops?

Isaiah uses a question to scold the people of Judah. Alternate translation: "You should not go and stand on the tops of your houses." (See: rc://en/ta/man/translate/figs-rquestion)