en_tn/2sa/22/12.md

He opened the heavens ... rain clouds in the skies

David describes Yahweh's way of saving David from his enemies as a storm cloud gathering over a place. This emphasizes God's power and his anger. (See: rc://en/ta/man/translate/figs-metaphor)

He made darkness a tent around him

Here the darkness Yahweh creates is compared to a tent which hides him completely. Alternate translation: "He hid himself in the darkness" (See: rc://en/ta/man/translate/figs-metaphor)