The heavily drenched Nong Khai is just centimetres away from crisis as the Mekong River continues to rise and northern run-off keeps pouring in with further rainfall expected to hit Thailand this week.
Overflow from the river Monday flooded parts of Nong Khai municipality, as soldiers rushed to help 40 households by creating sandbag walls. Other low-lying areas also reported similar incidents, although the province's economic centre in Muang district remained safe from the most serious flooding, on Monday at least.
But the situation is highly volatile as water in the Mekong River rapidly rises. On Monday, its level reached 12.83 metres, just shy of the 13m threshold and a 52cm increase on the day before.
Powerful run-off from the North is heading towards Nong Khai, Bung Kan, Nakhon Phanom and Mukdahan, which all sit on the bank of the Mekong.
Nong Khai's neighbouring province, Nakhon Phanom, has already borne the brunt as 300 families in Si Songkham district struggled against floods brought by the overflowing Songkham River, a branch of the Mekong.
So far officials been unsuccessful in pushing water out of the tributary as their efforts are blocked by the high level of the Mekong.
To add to their concerns, the Meteorological Department warned that rainfall will continue in first half of the week and become stronger nearer Sunday. Almost all the regions in the country will encounter the combined effects of a severe southwest monsoon in the Andaman Sea and the monsoon trough across Myanmar, Laos and Vietnam.
Bangkok, it said, will be also soaked by rain every day until Sept 9.
In the Central Plains, officials continue to control the level of the Chao Phraya River, which is increasing due to massive northern run-off and, at the same time, attempting to make sure water stocks remain full in case of possible drought during the dry season.
Meteorological Department rainfall records show that this September's rain is still "lower than the yearly average", deputy Prime Minister Chatchai Sarikulya said.
He also mentioned plans to make artificial rain in some areas later in the year.
"We'll know by the middle of this month how much water to keep," Gen Chatchai said.