Local weather forecasters issued the first red rainstorm alert of the year - the highest on the 3-level warning system.

上海中心气象台发布了今年以来首次最高级别的暴雨红色预警信号。

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Beijing and much of industrial northern China are in the midst of a "red alert," the highest level in China's four-tiered pollution warning system.

北京及许多中国北方工业城市目前处于“红色预警”状态，这是中国污染预警系统四个级别中的最高阶。

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Early warning system of unemployment include: the warning level of unemployment, early warning signal systems of unemployment, contingency plans for the unemployed and the committee of Experts.

失业预警系统主要包括：失业警戒线、失业预警信号灯系统、失业应急预案和失业预警专家委员会。

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The question is, how do we co-ordinate an asteroid early warning system at the global level?

UNESCO: Open Access to Scientific Information

By next year, the country aims to take its warning system to the next level by calculating the height and the arrival of a tsunami, said the director of Indonesia's earthquake and tsunami center, Fauzi, who like many Indonesians uses only one name.

CNN: Asian tsunami warning system: A last-mile challenge

Progammes include the Global Sea Level Observing System ( GLOSS), regional tsunami warning systems and the Harmful Algal Bloom Programme ( IOC-HAB).

UNESCO: Ocean industries and the scientific community join forces to monitor the ocean | United Nations Educational, Scientific and Cultural Organization