Air quality in Hanoi sharply declined on the morning of 27/1, as a weakening cold front created unfavorable meteorological conditions for dust dispersion.
As night temperatures plunge below 0 degrees Celsius, Liu Ming, like many others, hesitates to turn on his gas heater, facing winter heating costs that could triple his entire annual pension.
Young children, the elderly, individuals with underlying medical conditions, or those who frequently work outdoors should enhance their preventive measures during periods of air pollution to avoid illness and complications.
Beyond the affluent, many young families are taking on debt to buy homes in rural areas or rent suburban homestays, "migrating" every weekend when air pollution levels rise in Hanoi and Ho Chi Minh City.
Dry, sunny weather causes temperature inversions, preventing dust from dispersing and leading to a significant increase in air pollution, reaching very unhealthy levels.
Thousands of vehicles, gridlocked on Rohtang pass, are not tourists but delhi residents escaping the city's toxic air, inadvertently making the mountain region its latest casualty.
After approximately three days of good air quality due to cold weather, Hanoi's air quality index (AQI) began to rise again on the afternoon of 16/12, with many monitoring stations recording unhealthy levels, approaching very unhealthy thresholds.
Ho Chi Minh City plans to install 157 air quality monitoring stations to track pollution trends, provide early warnings of risks, and support the development of policies for emission control.
On the morning of 11/12, several monitoring stations in Hanoi recorded air quality index (AQI) readings above 220, indicating a very unhealthy level; Hung Yen and Thai Nguyen also reported readings exceeding 200.
With his three-year-old daughter suffering from rashes and himself battling insomnia due to sinusitis, Tran Huy used all his annual leave to take his family to Nghe An, escaping a prolonged period of pollution.
Fine dust, tens of times smaller than a human hair, penetrates pores, damaging the skin's natural protective layer, causing irritation and premature aging.