South China Morning Post — 2 Feb. 2011
Air pollution in Hong Kong again soared to worrying levels on Wednesday – with roadside pollution index readings in Causeway Bay, Central and Mong Kok recording “very high” levels.
At 1pm, the roadside reading in Causeway was 182, whereas in Central and Mong Kok it was 137 and 107, respectively. The air pollution index in other areas was also high.
Observatory forecaster Steven Ng said the high pollution levels were due to dry weather.
“Hong Kong is now experiencing light-to-moderate northeasterly winds. We expect the situation will continue until Thursday or Friday,” he said.
“Usually, when winds come from the north they bring particulates in the air – visibility is not too good,” Ng told local radio.
The observatory advised people with heart or respiratory illnesses, children and the elderly to be careful