Officials believe it may be the worst natural catastrophe that's ever hit the southern hemisphere.

官员认为这是南半球有史以来遭遇的最严重的自然灾害。

We are almost at the point of a natural catastrophe which reminds us of the flood in 1910.

我们简直就要面临一场自然灾害了，这让我想起了1910年的洪水。

Together, they have the world's largest capacity to provide relief in any war zone, disaster area or natural catastrophe.

并一道在战区、灾区或天灾人祸面前提供最强大援助。

Natural catastrophes have wreaked havoc on  the planet throughout human history – and even before it.

纵观人类历史，甚至在此之前，自然灾害都对地球造成了严重破坏。