Abstract: With increasing attention to environmental health issues, research on environmental health risk assessment and early warning have become a hot spot. Progress has been made on the early warning of health risks from environmental risk factors such as air pollution, heat waves, and cold waves. The air quality health index(AQHI)and early warning platform have been established in many pilot cities across the country, providing a scientific reference for public health protection. Research and application on early warning of health risks from extreme weather have also been initiated. The early warning models and early warning classification of heat wave and cold wave health risks have been constructed, and real-time release has been realized in pilot cities. In general, research on the early warning of environmental health risks and public health services in China is still in the initial stage. More research is needed, applicability should be evaluated, and the early warning model and related indexes should be optimized. Meanwhile, a multi-sectoral cooperation mechanism should be established, and a sound working-system of early warning of environmental health risks should be constructed, in order to promote its application nationwide. Based on the early warning information, intervention measures should be taken to reduce health risks caused by environmental factors and improve peoples health.

Key words: Environmental health, Early warning, Public health services, Air quality health index