Air pollution in several parts of Hong Kong reached "serious" levels on Wednesday, officials said.

The Environmental Protection Department (EPD) said that with Super Typhoon Doksuri approaching, the city was extremely hot with light winds unfavourable for pollutant dispersion. The conditions were leading to the formation of ozone and a build up of fine particulates in the Pearl River Delta region, it said.

Children, the elderly and people with heart or respiratory illnesses were advised to cut down on time spent outside, while employers of outdoor workers were urged to assess the risks and take preventative measures to protect the health of their staff.

The Education Bureau said schools should take appropriate measures to safeguard students' health.

The EPD said it expected air quality to improve by Friday.

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Last updated: 2023-07-26 HKT 15:22