Revelation 16:8-9

8  And the fourth angel poured out his vial upon the sun; and power was given unto him to scorch men with fire.

9  And men were scorched with great heat, and blasphemed the name of God, which hath power over these plagues: and they repented not to give him glory.

This fourth judgment should make it clear that these judgments are global in effect. I have read a lot of speculation about what may bring the heat and it ranges from nuclear warfare to depleted ozone in the atmosphere. However, the text plainly says that the vial will be poured out on the sun and not on the earth. No nation will escape the heat of the sun when it goes into a nova and scorches all mankind with great heat. This is the real future global warming that man should worry about.

With all this, they still will not admit that the God of heaven is Almighty. They will blaspheme His name for these judgments and probably call Him the Devil. Those that worship the Beast on earth really want Satan to be God, as do his fallen angels. Believing or wishing a lie is true does not make it true. There is only one Creator God and He is the one that dwells in heaven.