(Rev 16:2-4) So the first went and poured out his bowl upon the earth, and a foul and loathsome sore came upon the men who had the mark of the beast and those who worshiped his image. {3} Then the second angel poured out his bowl on the sea, and it became blood as of a dead man; and every living creature in the sea died. {4} Then the third angel poured out his bowl on the rivers and springs of water, and they became blood. (undrinkable; poisoned). (parenth. mine)
(Rev 16:8-12) Then the fourth angel poured out his bowl on the sun, and power was given to him to scorch men with fire. {9} And men were scorched with great heat, and they blasphemed the name of God who has power over these plagues; and they did not repent and give Him glory. {10} Then the fifth angel poured out his bowl on the throne of the beast, and his kingdom became full of darkness; and they gnawed their tongues because of the pain. {11} They blasphemed the God of heaven because of their pains and their sores, and did not repent of their deeds. {12} Then the sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, so that the way of the kings from the east might be prepared.