If God told you the Earth would end tomorrow, what you you do today?
I’d do what I always do. Read books, spend time with my wife, and probably write a blog post about the number of people running around like chickens with their heads cut off. What would it serve, though, to do anything else than the things that have made one happy up to that point?
Since I’m combative, my response to God would “No it isn’t” unless I was drunk and might say “I hope you enjoy it.”
More and more scientists and philosophers are saying that the “reality” we see is an illusion and/or it’s a simulation. If so, the end of the Earth would be an illusion. I believe this. So, quite possibly I would see life and consensus reality the same way I always had. Those who don’t see the illusion aspect of life would probably believe they were 
caught between the pages of an apocalyptic novel like George R. Stewart’s Earth Abides or, worse yet, Cormac McCarthy’s The Road.
Either book–or a similar book–would be a learning experience because people would remain stuck within their pages until they realized (a) perception is reality, and (b) you create your own reality. If more people understood that now, we might avoid the wrath of climate change. We are already stuck, it seems, within the idea of climate change and, for the most part, don’t seem worried enough to do anything about it–or create a different reality.
Perhaps that’s too much responsibility to consider.
The cat in my novel “Conjure Woman’s Cat” sees reality in the way I’ve described it here. That’s why I have cats.
