So does the Bible say that there will be a nuclear war during the tribulation?
New Testament describes events that could imply nuclear war.
By these three plagues a third part of mankind was killed by the three plagues of fire, smoke and the brimstone" (Revelation 9:18).
In Revelation 8:7b, we see: "A third of trees were burned up, and all green grass was burned up."
These verses could be describing the precise effects of a nuclear blast.