Revelation 16:1: “And I" [John] "heard a great voice out of the temple saying to the seven angels, Go your ways, and pour out the vials of the wrath of God upon the earth.”
Revelation 16:2: “And the first” [Angel] “went, and poured out his vial upon the earth;” [The land] “and there fell a noisome and grievous sore upon the men which had the mark of the beast, and upon them which worshipped his image.”
Revelation 16:3: “And the second angel poured out his vial upon the sea; and it became as the blood of a dead man: and every living soul died in the sea.”
Revelation 16:4: “And the third angel poured out his vial upon the rivers and fountains of waters;” [Fresh/drinking waters] “and they became blood.”