The government said that floods in the North will not have an impact on Bangkok and other downstream provinces, with Deputy Prime Minister Phumtham Wechayachai saying the situation is under control.
Mr Phumtham on Thursday said authorities have mobilised additional resources to deal with the floods in Chiang Rai, Phrae, Nan, Phayao and Sukhothai.
He said the floods across the North are caused by run-off from higher ground after the monsoon rains, and not caused by storms.
The floods are expected to begin receding in the next few days.
Asked about claims that this year's floods might be worse than in 2011, Mr Phumtham said: "Don't panic. The amount of water is manageable; if there is no more rain, the situation will improve."
Meanwhile, the Bangkok Metropolitan Administration said run-off from the North is expected to arrive in Bangkok around the end of this month.
In anticipation, City Hall is reinforcing flood walls along the Chao Phraya River, he said. The BMA is monitoring the water level and distributing sandbags to flood-prone communities to help reinforce flood walls.
Flash floods and landslides are possible in 35 provinces until Aug 30 due to heavy rains, while the Meteorological Department urged those living in the North and Northeast to be ready for heavy to very heavy rain from Aug 21 to 27.
Seven provinces have been hit by floods, with 12,777 households affected as of Thursday, namely Chiang Rai, Phayao, Lampang, Nan, Phrae, Phetchabun and Udon Thani.
