The poles of the earth are reversing, and they are doing so now!
Amazingly… anything 30º below or above the equator is going to go into a new glacial era, but wait… not any glacial era… temperatures are going to drop all the way down to absolute zero (hence the name of the film).
Special effects are similar to the kind of thing you would expect from a high school project. Scenes of people crawling on ice (which is so fake it barely resembles snow) are incredibly bad.
If you are blessed with Netflix and you just happen not to have any grass you can watch grow, this is an alternative almost as good.