Isa 13:13 Therefore I will shake the heavens, and the earth shall remove out of her place, in the wrath of the LORD of hosts, and in the day of his fierce anger.
Lam 2:21 The young and the old lie on the ground in the streets: my virgins and my young men are fallen by the sword; thou hast slain them in the day of thine anger; thou hast killed, and not pitied.
Lam 2:22 Thou hast called as in a solemn day my terrors round about, so that in the day of the LORD's anger none escaped nor remained: those that I have swaddled and brought up hath mine enemy consumed.
Job 20:28 The increase of his house shall depart, and his goods shall flow away in the day of his wrath.
Psa 110:5 The Lord at thy right hand shall strike through kings in the day of his wrath.
Zep 1:15 That day is a day of wrath, a day of trouble and distress, a day of wasteness and desolation, a day of darkness and gloominess, a day of clouds and thick darkness,
Zep 1:18 Neither their silver nor their gold shall be able to deliver them in the day of the LORD's wrath; but the whole land shall be devoured by the fire of his jealousy: for he shall make even a speedy riddance of all them that dwell in the land.
Rom 2:5 But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;
Job 21:30 That the wicked is reserved to the day of destruction? they shall be brought forth to the day of wrath.
Psa 21:9 Thou shalt make them as a fiery oven in the time of thine anger: the LORD shall swallow them up in his wrath, and the fire shall devour them.
Pro 11:4 Riches profit not in the day of wrath: but righteousness delivereth from death.
Zep 2:2 Before the decree bring forth, before the day pass as the chaff, before the fierce anger of the LORD come upon you, before the day of the LORD's anger come upon you.
I get rather perturbed at the ignorance of people who say that "God is a god of love" and would "never do anything to harm or hurt people". He would "never send anyone to hell". Wake up and smell the coffee!!! That's not what the Bible says.
It says that God is patient, but that eventually even His vast patience comes to an end, and because He is also a righteous God and Holy, He gets really ticked off at the sinfulness and rebellion of the world. In other words, He's had it!
It's at that point, that the world will experience what it is to face an angry God. There will be no place to hide and God's fierce anger will consume the earth. You do not want to come face-to-face with an angry God. It will not be a pretty sight!