So the thing with making a disaster picture is: what is the plot. Let's take solar flares. The sun is jetting out 1.6AU flares that come and lay some cities to waste. The Internet, shockingly, is still up (because it was, after all, designed to withstand a nuclear attack).
But that's not a movie. Here's a movie: A guy (gal/robot/thoughtful rabbit) has a problem that's hard to solve (especially because the world is blowing up). He's gotta solve his problem, even during this catastrophe. But then things get worse. They meet someone and that person gives them some more problems but also a different world view. Then things get even worse.. And shockingly things suck so much that there's not plan at all to fix the first problem, let alone the second problem.
But then the guy/robot/girl at the beginning remembers something that the person they met on page 20 told them. So they figure a plan.
The plan goes swimmingly. Until it goes dreadfully badly. And then it's all lost and there's no way to any good to come out of this except for -- that person from page 20. Whatever they did or said or gave to our hero can be used right now.
And the whole world is saved.