2004年海啸灾难过后，印度尼西亚建立了一套预警机制。可是周一地震之后，它似乎并未奏效。

A warning system was installed in Indonesia after the 2004 disaster but it did not seem to work after Monday's quake.

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不过如果当年卡特里娜的洪水预警人们接下来会到来的灾难，那么沿海城市的设计师们也许能想出合适可行的方案，以应对墨西哥湾与笼罩当地的可怕威胁。

But if the floodwaters of Katrina foreshadow things to come, then designers in coastal cities would do well to look at the proposals for the Gulf and the formidable challenges the region faces.

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事实上，一些研究正在研究动物这种感知此类灾难的能力以用于早期预警系统。

In fact, some researches are studying the abilities of animals to sense such disasters so they can be used as an early warning system.

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