I'm looking for a movie. From the 70s or 80s. Not the central plot point I don't think but, an aspect of the movie was the sky turning orange/red. SOME part of me is thinking aliens, and the way the people in the movie knew aliens were coming was the sky turned orange/red. But that part may just be my mind fucking with me. I just remember "the sky is orange/red" being a thing.
Again, 70s or 80s movies - NOT a 90s movie.