Factual error: There is a scene near the beginning of the movie when the mist has just begun. A firetruck roars by, and has Caddo Parish Fire Dept. on the side. This movie is set in Maine. Louisiana is the only state with parishes. All others, including Maine, have counties. (00:10:50)
Factual error: At the very end of the film, when they are driving in the land cruiser, a white Maine state trooper vehicle is upside down. In reality, they are blue. The livery shown is that of the Illinois State Police. (01:47:45)
Answer: I'll have to answer my own question here. After doing some research, it appears that yes, "The Mist" was partially an inspiration for Konami when they created the "Silent Hill" series.