In the opening sequence when the bad guys bombed the dam, the footage of the flood water surging through the canyon was reused footage from "Superman '78". The light level was adjusted to make it appear to be night.
Even though Marjoe Gortner's character (Brother Jebediah / Johann Rector) is pretending to be a preacher, he was one in real life. He started evangelizing at the very young age of 4.
Despite having several sentences of dialogue, the name of the actor who plays Sara Longwood's father is not included in the credits.
In the opening sequence when the bad guys bombed the dam, the footage of the dam's destruction and the water surging through was reused footage from Force 10 from Navarone (1978).
In Dambreakers (1985) and Kingdom Come (1985), Devon Ericson played villains who used B-25 bombers as part of her evil plot.