This morning, December 13th, Hanoi was shrouded in a thick fog.

This morning, December 13th, Hanoi was covered in a thick, opaque white fog accompanied by light rain, severely reducing visibility and causing traffic difficulties.

Observations made at 7 a.m. this morning on major thoroughfares such as Le Van Luong, To Huu, Lang Ha, Hoang Cau, and Nga Tu So showed severely limited visibility. Tall buildings appeared only as blurry, indistinct shapes, hidden in a thick white haze.

High-rise buildings in the Trung Hoa - Nhan Chinh area are shrouded in smog and fine dust. Photo: QUOC KHANH

In the Le Van Luong street area, the 20-30 story apartment buildings lining both sides of the road almost "disappear" from the 10th floor upwards. On the road, even though it's bright enough to see people's faces, cars and motorbikes all have to turn on their yellow headlights to cut through the fog.

Fog and fine dust at Hoang Cau Lake. Video: QUOC KHANH

Hoang Cau Lake this morning. Photo: QUOC KHANH

The To Lich River also became hazy due to fog, fine dust, and light rain. Photo: QUOC KHANH

Hanoi's streets were shrouded in fog, rain, and fine dust this morning. Photo: QUOC KHANH

According to environmental experts, the phenomenon in Hanoi this morning is the result of a "double" synergy. A reinforced cold air mass compressing a low-pressure trough, combined with high humidity from light rain (drizzle), created a dense layer of fog.

However, it's worth noting that this fog isn't simply water vapor. It also includes fine particulate matter (PM2.5) suspended in the lower atmosphere that cannot disperse due to the temperature inversion phenomenon that has lasted for several days.

Instead of being washed away by the rain, dust and dirt, when exposed to light rain and high humidity, cling even more tightly to the layer of air near the ground, creating a "thick" atmosphere that is unpleasant for passersby.

High-rise buildings on Le Van Luong Street are shrouded in fog and fine dust. Photo: QUOC KHANH

Photo: QUOC KHANH

Given the poor air quality and the cold, rainy weather, health experts advise people, especially the elderly and young children, to limit going out in the early morning. When commuting, people should wear specialized masks to protect against fine dust, keep warm, and adhere to safe speed limits to avoid unfortunate collisions due to limited visibility.

NATIONAL DAY

Source: https://www.sggp.org.vn/sang-nay-13-12-ha-noi-chim-trong-man-suong-mu-dac-quanh-post828435.html