These phrases stand for the kings and their armies. Alternate translation: "the king of the South and his army ... The king of the North and his army" (See: [[rc://en/ta/man/jit/figs-synecdoche]])
Violently attacking with an army is spoken of as if a storm happened. Alternate translation: "will attack him like a violent storm" or "will violently attack him" (See: [[rc://en/ta/man/jit/figs-metaphor]])
When an army overruns a country, it is spoken of as if a flood occurred. See how you translated this in [Daniel 11:10](../11/10.md). (See: [[rc://en/ta/man/jit/figs-metaphor]])