Several cities and provinces across the Mekong Delta have seen dense clouds of fog in recent days, mostly in areas near rivers, canals or ditches.

A flowing cold snap is largely to blame, as it is pushing down temperatures. Coupled with high humidity, more clouds of fog have taken shape, said Nguyen Minh Giam, Deputy Director of the Southern Region Hydrometeorology Station.

The haze has obscured the visibility in Can Tho, Dong Thap, Vinh Loc, Soc Trang and Hau Giang, restricting vision to a distance of 20-30m in the early morning, before dissipating around sun rise.

Giam forecast that the unusual weather will continue in the coming days.-VNA