William Burkitt on Revelation 8:8

Observe here, 1. The universality of the judgment inflicted; the former judgment was upon the earth, this upon the sea; that no place might escape, a storm of hail and blood falls upon the former, a mountain of burning fire is cast into the latter; both signifying increased wars and bloodshed by sea and land, according to some; the mighty prevalency of error and heresy, say others, and particularly of the Arian heresy, which puffs up and swells with pride, and is the harbinger and forerunner of ruin and destruction; as only by pride cometh contention, so after pride, or along with pride, cometh destruction.