BEIJING - China's meteorological authority has issued a yellow alert as heavy smog will shroud Beijing, Tianjin and Hebei Province in the next three days.

Foggy weather will appear in north China and areas along the Yellow and Huaihe rivers, while some parts of Beijing and Tianjin, and the provinces of Hebei, Shandong and Liaoning will see heavy air pollution until Wednesday morning, the National Meteorological Center (NMC) said on Tuesday.

The NMC forecasted that the smog will by dispersed by a cold front on Friday.

China's meteorological alerts are categorized as blue, yellow, orange and red as the severity ascends.