WEBVTT

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For about a week now, many areas in Ho
Chi Minh City have been covered in fog 

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from early morning to afternoon, even at night. 

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In Thu Duc city, the area on both sides
of the Saigon River, Vang Ken Rach, the 

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fog layer is even longer. 

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Within a visibility range of less than 1
km, most high-rise buildings and 

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residential areas are obscured in opaque white. 

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I find the weather very dusty and
polluted. Lately, I find that as soon as 

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I go out, it looks like fog and smell. 

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When I go out, I wear sunglasses,
a mask, and glasses. 

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This pill, I think, also reduces the
health risks it poses. 

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Because it has this green tree, it
absorbs the dust called nino 

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dust, small dust. 

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If there are no trees outside, she is
not sure if it can ensure her health. 

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That means looking at the building from
afar will still be clear, but the 

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visibility will be more limited than
when the sky is clear. 

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According to meteorological experts,
this foggy phenomenon does not only 

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occur in Ho Chi Minh City. 

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but also takes place in provinces and
cities in the Southern region. 

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In places with well-ventilated mattress
surface, the fog disappears faster. 

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Every year, around the end of November,
the beginning of December and January, 

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is the time when the continental cold
high pressure system in the North 

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diffuses deep into the rivers of
Vietnam, making the weather cold 

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in the North. 

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At the same time, the continental cold
wave diffuses deep into Vietnam, causing 

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the temperature to drop. If in the South
there are areas called moisture 

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convergence zones like the recent one,
in the South a low pressure trough 

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forms, and above the low pressure trough
there are moisture convergence zones, so 

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it makes the sky very
cloudy, especially low-level clouds. 

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So, especially in the morning, when the
light entering the sky cannot pass 

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through the low layer of clouds, it
means that the air is both low 

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temperature and high humidity and the
sunlight cannot get down. 

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So it is very easy to create a condition
to form a sleeping layer that covers up 

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structures such as high-rise buildings
like the ones in recent days. 

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According to the AirVisual application,
the concentration of PM2.5 dust in Ho 

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Chi Minh City always shows red copper. 

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many times higher than the WHO annual
air quality guideline value. 

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People should limit going out,
especially sensitive groups such as 

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the elderly and children. 

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people with problems related to respiratory diseases.