红色预警背后：中国天气预警体系解析
When great danger approaches, warning systems become vital. In July, China's meteorological authority issued the first red alert of the year for torrential rain, signaling extreme risk. But what exactly does a red alert mean? To understand its urgency, we need to look at China's four-tier weather warning structure.
Since 2007, China has used a color-coded system to warn the public about meteorological disasters. The four levels are blue (Level IV), yellow (III), orange (II), and red (I), with red being the most severe. Each level corresponds to specific thresholds—for instance, a blue rainstorm alert means 50 mm of rain in 12 hours, while red indicates over 100 mm in just 3 hours. The system covers typhoons, rainstorms, heatwaves, and other hazards.
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