"Wail, for the day of the Lord is near; it will come like destruction from the Almighty." NIV translation
The "day of the Lord" refers to the return of Jesus and so we see that the focus has shifted to the Babylon that is to come.
"Because of this, all hands will go limp, every man's heart will melt. Terror will seize them, pain and anguish will grip them; they will writhe like a woman in labor." NIV translation
"See, the day of the Lord is coming - a cruel day, with wrath and fierce anger - to make the land desolate and destroy the sinners within it. The stars of heaven and their constellations will not show their light. The rising sun will be darkened and the moon will not give its light." NIV translation
These same events are described by John with the sounding of the fourth trumpet. (see Revelation 8)
"I will punish the world for its evil, the wicked for their sins. I will put an end to the arrogance of the haughty and will humble the pride of the ruthless." NIV translation
As we see, this day is a day of judgment. It is interesting to note that, out of all the evil that is going on, God speaks here of the arrogance. That arrogance is man insisting that they do not need the Creator of the universe.
"I will make man scarcer than pure gold, more rare than the gold of Ophir." NIV translation
Ophir is probably located in the country that is known today as Yemen. This is the place where King Solomon sent ships to get gold (see 1 Kings 9:28). This verse speaks to the fact that there are billions of people on the earth but comparatively few will escape the coming judgment. The Babylon system described in Revelation becomes worldwide but, at the judgment, its followers are removed.