According to the Vietnam Meteorological and Hydrological Administration, there will be about 12-13 typhoons and tropical depressions operating in the East Sea in 2018, of which 5 to 6 typhoons and tropical depressions directly affect the mainland.
At the beginning of the season, typhoons and tropical low pressure tends to occur in the northern part of East Sea and gradually move to the South in late months of 2018. It is forecasted that typhoons will have more impacts on the Central region.
Meanwhile, the extreme hot spells on large-scale in the North and Central of Vietnam this year will appear later than usual and less extreme as one in 2017.
In the dry season of 2018, in the Central region and Central Highlands, on many rivers the water level will reach the lowest level in the monitoring data series; the drought condition and partial lacking of water will also appear in this area.
The salinity intrusion in the South during the dry season is lower than the average of many years and equivalent to one in 2016-2017.
The flood peak in the rivers and streams in the northern region will be common in level of 2 to 3; some small rivers and streams on the level 3. Flash floods and landslides will be equivalent to one in 2017, especially in the North-West of Vietnam.
The flood season in rivers in Central region and Central Highlands are likely to occur early. The peak of floods in 2018 on rivers will be equal or higher than the average of many years.
In the Mekong River basin, the flood season arrives earlier than the average of many years; by the end of July, the headwater level of the Mekong River is likely to be 2.5 - 3.0m; flood peak in 2018 is likely to fluctuate at the level of 2 to 3.