Chuck’s review published on Letterboxd:
Okay, so they tried to combat global warming, but instead they turned the world into a winter wonderland. The only thing that can save what's left of humanity and life on this planet is this train. Why a train? I kept asking myself that same question for most of the movie. Then it's finally explained that if the train stops, everything dies. Still, why a train? I don't want to get all spoiler-y, but apparently there was enough lead time to install an aquarium car and a meat locker car. Still, why a train? I'm starting to think that the train was more of a metaphorical than a practical device for this story. That might have been a idea the authors of Le Transperceneige had. Possibly with some inspiration from Supertrain.
It's quite possible that I just saved myself the trouble from watching yet another television series.