Clearly, if there is a God he allows suffering. Possibly to force evolution, and growth of the soul.
But the bible clearly states that God deliberately caused the flood, and destroyed Sodom and Gomorrah.
The point I am trying to present is that ancient people had a different mindset from ours. God did everything. It wasn't gravity that kept people grounded, it was God. It wasn't plate movement that caused earthquakes, it was God. An eclipse was not caused by the earth or moon moving in front of another body, it was God. Both goodness and catastrophe were from God and by God. All was designed by God. Today, when a flood results in casualties, our modern mindset tells us it was flood conditions that resulted in death. We trace back what caused these flood conditions, a deluge, a hurricane, a break in the dam. That's where our minds go today; they don't go to God caused it. Because our minds don't think in the same manner as the ancients, when we read their words, we picture God with a magic wand intentionally causing all sorts of mayhem and destruction. That was not the picture the ancients were drawing.
Think of it like this. If God created the laws of physics, or even used laws of physics, to create this universe, then as creator He is ultimately responsible for every single thing that happens, no matter how small. I stub my toe--God's doing because He is the creator that made it possible for my toe to come into being and trip over a rock that He also caused to come into being. Ultimately, it can be argued that God even caused my clumsiness--not because He gave me a push, but because He made me and the things around me at all.
The ancients (those of faith) never lost sight of God and how mankind is affected by how God designed us and the world in which we live. It is said that God is all good and that He is pure love--so much so that evil and hatred cannot exist in God's presence. Good will always overcome evil; love will overcome hatred.
The ancients recognized this--that if they turned to evil and hateful ways, God could no longer remain in their presence. They recognized when they repented of evil and hate, goodness and love could exist among them. If that is not a law of physics, it does seem to be some law of God, or a law of creation.
So yes, God's creation can wipe out mankind, and ultimately we can point to the Creator and say, "If you had not created, none of this would have happened. It's all your doing." What we cannot do is manufacture a God who points a magic wand at people from time to time and zaps them out of pure pique.