The flood from the serpent's mouth symbolizes an armed force sent by the Antichrist to pursue and destroy the fleeing Jewish remnant.
It is not literal water. Les Feldick shows that just as Pharaoh sent his army after Israel at the Exodus, the Antichrist will issue a command for an armed force to destroy the Jews who flee Jerusalem. When the earth opens her mouth and swallows the flood, it pictures God destroying that pursuing force before it reaches the escaping remnant.
Revelation 12:15-16 — These verses show the serpent casting a flood after the woman and the earth swallowing that flood—the imagery this question asks about.
Exodus 14:28 — This verse describes the drowning of Pharaoh's army and is the Exodus parallel Les uses to interpret the flood as an armed force.
In Revelation 12:14, the woman is given two wings of a great eagle and carried into the wilderness, where she is nourished for a time, times, and half a time from the face of the serpent. In verse 15, the serpent casts water as a flood out of his mouth after the woman so that the flood might carry her away. In verse 16, the earth helps the woman by opening her mouth and swallowing up the flood that the dragon cast out of his mouth. The text does not define the flood as literal water; it simply describes a destructive outpouring aimed at the woman and the earth's response in swallowing it. The Old Testament parallel in Exodus 14:28 records that the waters covered the chariots, horsemen, and all of Pharaoh's host that came into the sea after Israel, leaving not so much as one of them.
Les Feldick teaches that the flood from the serpent's mouth is symbolic language, not literal water. The serpent is Satan working through the Antichrist, who is headquartered in Jerusalem. When the Antichrist learns that a large group of Jews is fleeing toward the mountains southeast of Jerusalem, he issues a command for an armed force to pursue and destroy them. Les says that command is the flood—he simply sends the command to destroy those escaping Jews. This mirrors Pharaoh, who sent his army and chariots after Israel at the Exodus. Les then explains that the earth opening her mouth pictures the earth opening up—likely through an earthquake—and swallowing the pursuing armed force, whether it is a regiment or another military unit. Word later reaches the Antichrist that his armed force was totally destroyed. Les also places this in the context of God's protection: the escaping remnant of Jews will be providentially protected and nourished for the final three and a half years, just as Israel was insulated from the plagues in Goshen.
Les points to the Exodus as the main interpretive parallel. When Israel fled Egypt under Moses, Pharaoh commanded his army to destroy them, and the Egyptian army was engulfed in the Red Sea. In the same way, when the Antichrist hears that Jews are leaving the Jerusalem area, he sends an armed force to destroy them. The flood is a symbolic description of that military pursuit, not a literal body of water.
According to Les, the earth helps the woman by opening her mouth and swallowing up the pursuing armed force. He connects this to the many earthquakes of the tribulation period and sees it as the New Testament counterpart to the Red Sea covering Pharaoh's troops. After the force is destroyed, word gets back to the Antichrist in Jerusalem, and he—indwelled by Satan—turns his anger on the remnant of her seed.
Les teaches that the woman represents the escaping remnant of Jews, and that she will be fed and protected in the wilderness for a time, times, and half a time—the final three and a half years. They flee to the mountains southeast of Jerusalem, and God will insulate them from the tribulation ravages that affect the rest of the world, just as Israel was insulated in Goshen.
God's Protection of the Escaping Remnant
Les sets the context: the fleeing Jewish remnant will be fed, protected, and insulated from tribulation plagues for the final three and a half years.
The Flood as an Armed Force
Les identifies the serpent as Satan working through the Antichrist and says the flood pictures the Antichrist ordering an armed force to pursue and destroy the fleeing Jews, just as Pharaoh did.
Flashback to Pharaoh's Command
Les says the language requires a flashback to the Exodus: as Pharaoh sent his army to destroy Israel, the Antichrist will send an armed force to destroy the escaping Jews.
The Flood Is the Command to Destroy
Les explicitly says the flood is symbolic language for the Antichrist's command—an armed force sent to destroy the escaping Jews—just as the Egyptian army was destroyed in the Red Sea.
The Armed Force Destroyed and Antichrist's Fury
Les describes the aftermath: the Antichrist learns his armed force was totally destroyed, and he, indwelt by Satan, turns his war against the remnant of her seed.
The Earth Swallows the Flood
Les says the earth opening her mouth represents the earth opening—likely by an earthquake—and swallowing the armed force pursuing the Jews, a perfect parallel to the Red Sea covering Pharaoh's troops.
What Really Happens at Armageddon — Revelation 16 & 19
In other words, get rid of the Jew. And so I look at this final gathering of the nations at Armageddon as Satan's attempt to once and for all annihilate the Jewish people. But of course, it's going to really end up Satan in his final war against the Christ. But here we have the Antichrist now then, indwelt by Satan, who symbolized by these frogs coming out of his mouth.
Noah’s Ark: How Did All the Animals Fit? (Genesis 6-7)
In other words, get rid of the Jew. And so I look at this final gathering of the nations at Armageddon as Satan's attempt to once and for all annihilate the Jewish people. But of course, it's going to really end up Satan in his final war against the Christ. But here we have the Antichrist now then, indwelt by Satan, who symbolized by these frogs coming out of his mouth.
Revelation 12:14: And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent.
This verse shows the woman being protected in the wilderness before the serpent sends the flood against her.
Revelation 12:15: And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood.
This is the verse describing the serpent's flood after the woman—the symbolic action the page interprets.
Revelation 12:16: And the earth helped the woman, and the earth opened her mouth, and swallowed up the flood which the dragon cast out of his mouth.
This verse records the earth swallowing the flood, which Les sees as God destroying the armed force pursuing Israel.
Exodus 14:28: And the waters returned, and covered the chariots, and the horsemen, and all the host of Pharaoh that came into the sea after them; there remained not so much as one of them.
Les uses Pharaoh's army being swallowed by the Red Sea as the model for interpreting the flood as an armed force destroyed by the earth.
No, Les treats it as symbolic. The flood represents an armed force—possibly a regiment or larger unit—sent by the Antichrist to destroy the Jewish remnant. The physical water is not the point; the military pursuit is.
Les teaches that the serpent in Revelation 12 works through the Antichrist, who is headquartered in Jerusalem. When he learns that Jews are fleeing, he orders an armed force to pursue and kill them.
Les says the earth opening her mouth means the earth literally opens—likely through an earthquake—and swallows the pursuing armed force. It destroys the flood and protects the escaping Jews, much as the Red Sea destroyed Pharaoh's army.
Watch the Teaching: The Abomination of Desolation: Why Israel Must Flee (Matthew 24)