Author William R. Forstchen's best-selling novel The Second imagines the devastating impact of EMP on the United States - being adapted into a feature film.

The script will be written by renowned science fiction writer J. Michael Straczynski, with Forstchen himself serving as executive producer.

Fox News Digital talks with Forstchen about the real inspiration behind his work and why he warned that EMP attacks are an imminent threat, not just science fiction.

"I want to write an accurate, very accurate story about what will happen in a small town in North Carolina that will never recover if the electricity goes out," he said.

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Forstchen is summarizing his PhD. At Purdue University, he began pursuing novels that attacked the U.S. EMP.

He said he worked hard to separate the novel and clarify his ideas until he had “the moment of God” when he graduated.

"I call it 'God's Moment'. I was sitting there, sweating in my robes, looking at my students and parents, which shocked me - write us down, write my town."

The moment of inspiration brought him back to his hometown near Asheville, North Carolina - where he began writing accurate, engaging versions of events following the EMP attack disaster.

Forstchen began the writing process and drew inspiration from key figures in his hometown.

"I started interviewing people like crazy - the police chief, the pharmacist - and I learned how profound everything is depends on the invisible power lines," he said.

He pointed to an interview with local pharmacists, who shared that he cried after thinking about what would happen after the EMP strike.

"I started interviewing people like crazy. I will never forget to end talking to the police chief. I said, 'Well, Jack, what would you do? He picked up the phone and he said, wait, for a minute, the phone is no longer working, are they?''

"I learned that pharmacists know more than anyone else. They are people who give heart medication, anti-psychotics, and she started writing such a long list of people who would die within two to three months," he said.

Nuclear EMP Attack: How Americans prepare for "very real threats", experts say

Forstchen co-produced his novel from dozens of interviews. "Another Second" was published in 2009 and remains on the bestseller list.

The novel is now adapted into an original MPI film, in conjunction with the Shocking Company.

The feature film was written by Straczynski, with Forstchen serving as executive producer. Scott Rogers is directing the film, which is scheduled to be filmed in Bulgaria in September this year.

Watch: US should prepare for nuclear EMP attacks, experts warn

Fox News Digital previously spoke to Forstchen about the EMP strike, saying the threat was "very real".

"EMP is generated when a small nuclear weapon, 40 to 60 kilotons or about three times the size of a Hiroshima bomb, is detonated 200 miles out in space above the United States. It sets up an electronstatic discharge, which cascades to the Earth's surface, feeds into the millions of miles of wires which becomes antennas, feeds this into the power grid, overloads the grid and blows it out," he said.

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Forstchen, citing 2002 and 2008 Congressional reports, said that if an EMP strike occurs, 80% to 90% of Americans will die a year later.

"The threat of EMP was first achieved in the 1962 starfish high-altitude nuclear test in 1962. What happened was that it blows up about 500 miles from Hawaii and rises 200 miles," he said. "They were able to bring the system back in a few days, but what would it look like if it took a month, six months, one year or five years to resolve?"

The late Peter Prya nuclear weapons expert and former chief of staff of the Congressional EMP committee, agreed. Prior to his death in 2022, PRY warned that the high-altitude ballistic missiles launched by Kim Jong-un were a test of North Korea's EMP capabilities to the United States.

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"The car will be paralyzed. The plane may fall out of the sky. You will have a gas pipeline explosion, an overload of the nuclear reactor," Puri told Fox Business in May 2017.