Jonathan Parnell wrote in a post about Ten Reasons You Should Read the Book of Job at the Desiring God site...
Persecution, disease, war, disability, disaster, freak accident, assault — all are alike in this: Satan aims to destroy your faith, but God aims to strengthen it.
This is such a helpful comment. When things go wrong nationally or personally we often find ourselves looking for reasons or explanations. Is this God's judgment? Is it God's discipline? Or is this as a result of living in a fallen world? Often times, especially in the case of large scale disasters, we have no way of knowing. In personal matters we may have an inkling that God might be disciplining us, if we know that discipline is due. But mostly, in the face of crisis, personal or national, it is simply not for us to know why, at least in the immediate situation.
But this, as Jonathan Parnell has said, we know. Satan will use the situation to destroy our faith. And God will use it to strengthen it. That is all we need to know. And then we need to attend to it in God's strength as best we can - that our faith might be strengthened. And that is enough.