These things are very deep, and it's hard to do them justice in a short blog post. So please read the following knowing that it's hugely over-simplified, but hopefully still helpful in explaining why God does things like national disasters.
The first thing to say is that absolutely everything that happens in the world is precisely tailored for each individual. No-one gets 'accidentally' caught up in a tsunami, flood, earthquake, forest fire or whatever else it is.
If a person is experiencing a natural disaster, if they're affected by it in someway, if they or their loved ones are injured or killed, God forbid, that's part of the Divine plan, and God doesn't make mistakes.
So now, why would God actually create natural disasters that cause so much suffering, and kill so many people?
Again, this is a huge spiritual question, that dovetails with the perennial difficulty about why apparently 'bad' things happen to apparently 'good' people.
Everything that happens is meaningful
The short answer is that everything that happens is meaningful, in some way, but what the meaning, message or purpose is will be completely different for each soul involved, according to what they came down to the planet to fix or work on, how far they got in their spiritual journey, and what spiritual 'debts' they had to pay off from a previous lifetime.
For example, say a child is killed in a natural disaster. There is no 'one' reason why that had to happen. It could be that the child in question was a very big soul that was taking the fall for their community, so to speak.
It could be, that the child didn't have a lot to fix, had completed their job down here, and was ready to return back to God.
It could be that the child was taken as a wake-up call for the parents.
And a million other reasons, besides.
Natural disasters are spiritual wake-up calls
Natural disasters, like everything else that happens in the world, are just coming to teach us that we're not in control, and that there is a purpose and meaning to life that goes far beyond physical pleasures, the body, and material desires.
We all know people who changed their whole lives around after experiencing something particularly shocking or traumatic. Once you realise how precious life is, it can cut through a lot of the garbage that's keeping us chained to bad habits and empty, unfulfilling and even destructive pursuits that so many of us fill our lives up with.
When you know that people are eternal souls, and not just finite bodies, it perhaps doesn't make natural disasters any more pleasant to experience or live through, but it gives them an additional dimension of meaning that can potentially lead to some hugely positive outcomes, and personal transformations that have an eternal pay-off.