An ozone warning has been issued for seven cities and counties in the eastern part of Gyeonggi Province, South Korea, effective 2 PM today. The warning, announced by the Ministry of Environment and the Korea Environment Corporation, impacts Seongnam, Namyangju, Yangpyeong, and four other municipalities. Ozone levels have reached concentrations considered harmful to public health, prompting authorities to advise residents to take precautions. These precautions typically include limiting strenuous outdoor activities. The warning signifies that ozone concentrations are expected to remain high for a period of time. Further updates will be provided as the situation develops, and residents are encouraged to monitor air quality reports.