Question. Context: The crew had originally intended to shoot in the mountains of Bulgaria, but after the country had endured one of its largest blizzards, they opted to return to South Africa. Filming took place in the Cape Town area which is where Tremors 5 was filmed. The opening scene was filmed in the desert made to look like snow with filters and video processing techniques. The nice weather was explained by climate change causing unusual warmth in the area. Having worked on the previous film series, the crew used CGI for many of the Graboid scenes.

Question: tremors a cold day in hell filming location?
Answer. in the Cape Town area
What step-by-step reasoning justifies that answer?
Reasoning: The relevant information to answer the above question is: Filming took place in the Cape Town area which is where Tremors 5 was filmed.