At 6.30am, a thick layer of fog causes visibility to fall to even several metres, and most vehicles hit the road with lights on.

According to the National Centre for Hydro-Meteorological Forecasting, freezing fog lies over northern localities, including Hanoi, on February 2 morning.

Police officers stood at junctions to control traffic.

Humidity in the air is forecast to stay very high at more than 90%.

Residents venturing out for morning exercises still feel chill due to high humidity and freezing fog.

With visibility falling to less than 10m, most vehicles turn lights on and move t slowly.

On Nhat Tan Bridge.

Photo: Tung Doan

Motorcyclists travel slowly along Long Bien Bridge in Hanoi due to poor visibility. Photo: Tung Doan

A woman at Lac Long Quan flower market at 7am.

Though it is 8 o’clock, the foggy situation is yet to improve, and vehicles still use fog lights.

A man ran on the road along the West Lake at 7.30am.

A couple at the West Lake this morning.

Hoan Kiem Lake, a historical landmark in Hanoi, was covered in a thick blanket of fog at 8am.

Young women took photo on a Hanoi street at 7am.

Most car and bike drivers move slowly in such adverse weather conditions.

Dinh Hieu - Chi Hieu - Minh Hien - Kieu Oanh