2 Metaphors for vapour

Dark grey mists were rising round them like a sea; but had that ever-thickening, ever-darkening vapour been the sea itself, and death inevitable, Mary Haselden would have hardly cared.

Vapours, Mr. SPECTATOR, are terrible Things; for though I am not possess'd by them my self, I suffer more from em than if I were.

2 Metaphors for  vapour