暴雨红色预警意味着什么？
When China's meteorological authority issues a red alert for heavy rainfall, it signals the highest level of danger. This year, the first red alert came as torrential rains flooded many regions. But what does this color actually mean, and why should people pay attention? Understanding China's weather warning system helps us grasp the seriousness of such announcements.
China's warning system uses four colors: blue, yellow, orange, and red, with red being the most severe. Each level corresponds to specific rainfall thresholds. For example, a blue alert may be issued when rainfall exceeds 50 millimeters in 12 hours, while a red alert is triggered by 100 millimeters in just 3 hours, or 200 millimeters in 6 hours. These numbers are not random; they are based on decades of data about what causes dangerous flooding and landslides.
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