Whatever our way of explaining terrible events, we need to see them from the long-range viewpoint.  Through the centuries such things have happened again and again.  Not only that, but humans themselves have inflicted barbaric suffering and destruction on others.
Natural disasters and man's humanity to man will continue unpredictably until Jesus returns.  We long for that time when He comes again because He will make things right. 

As the world grows darker, the promised return of the Son grows brighter.

:>)