After three or four warm days, from January 15, the North and part of the Central region will again be covered in a strong cold spell moving down from the center of the continent.
The northern and north-central regions continue to experience cold weather, according to the National Center for Hydro-Meteorological Forecasting.
Contagious diseases are escalating in the northern region because cold spell and polluted air hit the region.
According to the National Hydrology Meteorology Forecast Center, a cold air is operating powerfully towards the southward.
Medical experts warned that unpredictable weather and increasing travelling during Tet holidays (the Lunar New Year) will be conducive to outbreaks of measles.
The currently cold northern region of Vietnam will experience the first heat wave this year early this month, according to National Hydro Meteorological Forecasting Center.
Chilly weather in northern Vietnam has driven many elderly people and kids into hospitals while temperature in the south also decreased because the cold weather in the north has affected the south.