The film was originally envisioned as a disaster-themed film, but as the production developed, director Jean Rollin saw the potential for it to be a horror film instead.
The filming locations had extremely cold temperatures and often the makeup effects would start to freeze on the actors, making it difficult for them appear realistic on camera.
According to director Jean Rollin while shooting the nude scene with Brigitte Lahaie the outside temperature was so cold that Lahaie couldn't speak her lines.
Writer Jean-Pierre Bouyxou appears in two different bits : as the one-eyed living dead (with mustache), and as the living dead with a scythe (without mustache).