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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The technical route and principles of city meteorological early warning system of rainstorm and water logging in Xi an are introduced.

介绍了西安城市暴雨内涝灾害气象预警系统的技术路线及原理。

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