What figure of speech is utilized by Edwards when he says "there are the black clouds of god's wrath now hanging directly over your heads?"

Jonathan Edwards' sermon 'Sinners in the Hands of an Angry God' was first heard in 1741. Known in U.S. history as "The Great Awakening', it was a time when some Calvinist ministers felt that the Calvinist doctrine of predestination was being questioned, challenged, or just plain ignored. It was the lax of religious dedication among Calvinists' that Edwards responded to in his sermon. There is no doubt that his figure of speech utilized the power of imagery. The sermon is full of fire and brimstone directed to everyone as a reminder of the consequences, but especially to those Calvinists' who had 'lost their way'.  The quote you refer to sent a clear message by Edwards to those who sought to look elsewhere for spiritual peace. Look no further, God is just waiting to lash out. Repent your idol ways or else pay the price. Damned to hell for all eternity.