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根据中国气象局《气象灾害预警信号发布与传播办法》的规定,高温预警信号分三级,分别以黄色、橙色、红色表示。
According to the provisions of the Meteorological Disaster Warning Signal Issuing and Dissemination Means issued by the China Meteorological Administration, the high-temperature warning signal is divided into three levels, indicated by yellow, orange and red respectively.