These two sentences mean basically the same thing and emphasize that Moab's destruction will happen very soon. Alternate translation: "Moab's enemies will destroy her very soon" (See: [[rc://en/ta/man/translate/figs-parallelism]])
Something terrible happening soon is spoken of as if calamity were something that could move quickly to a place. Alternate translation: "terrible things will happen very soon" (See: [[rc://en/ta/man/translate/figs-metaphor]])