暴雨红色预警如何拉响：解读中国最高气象警报的背后标准
In May, China's meteorological authority issued its first red alert of the year for rainstorms, as heavy downpours caused flooding and landslides across vast areas. For many, a red alert is simply the most severe warning, but behind it lie precise scientific criteria and coordinated emergency responses.
The China Meteorological Administration (CMA) operates a four-tier color-coded warning system: blue, yellow, orange, and red. For rainstorms, a red alert means that accumulated rainfall in 24 hours has reached or will exceed 200 millimeters. To put that in perspective, many Chinese cities see total monthly rainfall of around 100-150 mm in a typical May, so 200 mm in a day is like receiving a whole month's rain in just 24 hours.
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