Being a biblical literalist does not mean that everything in the Bible can be taken literally. A rule of thumb is to take it literally unless there is good reason not to, and seek no other sense.
If one believes in a God who is all-powerful, capable of transcending the human and earthly realm then it means the Old Testament stories can all be taken literally. This includes Noah's Ark and the flood, the crossing of the Red Sea on DRY GROUND, the plaques of Egypt, Lot's wife turning into a pillar of salt, the 3 men in the fiery furnace unscathed, and on and on the list could go. Archaeology supports the literalness of events in the Bible.
In the New Testament, assuming that one believes that Jesus was and is God in human flesh, capable of doing the supernatural, then His miracles can be taken literally. He turned water into wine, and walked on water, among many others.
Prophecy has been fulfilled literally, to the exact detail.
Since there is no reason to believe that the plaques of Egypt were not literal and some are exactly like those listed in Revelation 16, there is every reason to believe they will happen literally again, in the last days.
However, there is much non-literalness in the Bible, in Revelation and other places in the form of parables, symbolism, allegories, and figures of speech.
Deciding whether or not to take the Bible literally, though, means the parts that can be taken literally are not justified or rationalized away as non-literal just because someone chooses to reject the truth of scripture or reject Jesus as God.
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