In "Biblical Perspective" R.E. Trotter writes:
Someone has said that God's wrath is God's love dammed up by man's disobedience, until finally the dam bursts, and it is poured out on the disobedient in righteous judgment. For myriads of people, the dam will burst after Jesus returns, and the tribulation will be a dreadful expression of His wrath and fury.
Source: Christ, the Triumphant Lord: Adult Teacher's Insights, page 42.