The drought in north China is getting worse. officials changed the warning color from blue to yellow which alarms advancement in drought severity.
中国北方旱情日益严峻 官方已经把旱情预警级别从蓝色提升到了黄色。
The maps show a widely recognized indicator known as the Palmer Drought Severity Index.
该地图展现了公认的指标—帕尔默干旱强度指数。
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