Heavy rainfall throughout the Mekong region that started in early June has contributed to the rise with recorded levels at most of the Mekong River monitoring stations above long-term average.

The water level at Thailand's Chiang Saen station has increased by 1.38m during the past week as observed and will  decrease by 0.15m within the next five days as forecasted. Similarly, at the Thailand's Chiang Khan station in downstream of the Xayaburi dam, the water level vary by 3.56m and 0.6m, respectively. Meanwhile, in the capital Lao PDR’s Vientiane station, Mekong River water level increased by more than 3.50m in the past week and will decline about 0.70m in the next five days as forecasted. From Nakhon Phanom (Thailand) to Pakse (Lao PDR), the river level rises more than 2.50m but is likely to decrease by about 0.60m next week.

In Cambodia, the water level at Stung Treng to Neak Luong stations increased by 0.65m during the past week and will increase by 0.60m within the next few days.

In the Mekong Delta, the water levels at Tan Chau and Chau Doc stations fluctuated close to their long-term values as a result of tidal effects.

Over the past week, Mekong Basin received approximately 60% higher than the monthly average the same period in 2019 and 2020. However, rainfall will be lower than average in July and about average in August and September.