The flash floods prompted local officials and troops from the 12th Cavalry Battalion to rush to help affected villagers move their belongings upstairs or to higher ground. 
Officials said Tambon Den Chai of Den Chai district was submerged under about 50 centimetre of murky water that rose very quickly. 
The downtown of the tambon and the main Den Chai-Phrae road were under water. 
Damrongkiart Kittiprapat, deputy mayor of Tambon Den Chai Municipality, said the tambon was hit by heavy rain that began in the evening, with the tambon office alerted at 9pm that the runoff had hit the downtown. 
He said Ban Pak Puak, Ban Den Chumphol and Ban Huay Kuad villages were hit by flash floods. 
The floodwaters began to subside at dawn.

Phrae tambon submerged by runoffs overnight

Several areas in Phrae’s Den Chai district were inundated by strong mountain runoff triggered by heavy rains overnight, officials said on Tuesday.