That's the question posed by Amanda and Johnathan Witt in this post on their blog Wittingshire:
"It is true that we who are Christ's body bring divine succor to a wounded world.
But we mustn't forget that in bringing healing to the world's wounds, we are somehow tending the wounds of Christ himself--for whatever we do for the least among us, we do for him (Matthew 25:34-46). Mother Teresa of Calcutta took this quite literally. Christ participates in the suffering of the world.
Was God present when the tsunami struck? Yes. He was stricken by it. That is the great mystery of the Incarnation: Our Lord makes himself vulnerable to his creatures and his creation."