The increase in Yahweh's anger is spoken of as if it was a fire starting to burn. This can be stated in active form. See how you translated a similar phrase in [Numbers 21:20](../21/20.md). Alternate translation: "Yahweh became very angry" (See: [[rc://en/ta/man/translate/figs-idiom]] and [[rc://en/ta/man/translate/figs-activepassive]])