dangerous weather phenomenon

Difference between El Nino, La Nina and ENSO
El Nino, La Nina and ENSO are all dangerous extreme weather phenomena.
At the end of December, there will be the first cold, damaging cold spell
In the winter-spring season 2018-2019, the time of occurrence is very cold and harmful compared to the average of many years (AMY), ie in the second half of December 2018.
How many storms did Vietnam suffer in August?
This month, typhoons and tropical depressions are capable of operating in the South China Sea about 1-2 times and about 1 attack affects the mainland.