Bad air likely to continue until tomorrow.
According to a report, the Environmental Protection Department recorded very high Air Pollution Indices (API) at roadside air quality monitoring stations on 24 October, and said the bad air is likely to continue for the next two days due to high concentration levels of nitrogen dioxide.
At 11am, stations at Causeway Bay, Central and Mong Kok recorded API readings of 156, 192 and 112. The department said a continental airstream with relatively high background pollution levels is influencing Hong Kong. The combination of fine weather and moderate wind has enhanced ozone's formation and accumulation, which combined with roadside vehicle emissions has resulted in the high readings.
A lack of wind due to the northeast monsoon means the pollutants will remain in the area for the coming few days. The department says people with heart or respiratory illnesses, seniors and children should reduce physical exertion and outdoor activities, and avoid prolonged stays in streets with heavy traffic.
It has also advised people to take public transport when practicable.
The Education Bureau urged schools to monitor the API in the coming days, and to reduce students' physical exertion and outdoor activities.
The Labour Department urged employers to assess the risks of outdoor work. Employees who feel unwell should inform their supervisors.
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