Many areas in Chom Thong district of Chiang Mai province were hit by flash floods caused by heavy rain throughout Friday night.
According to media reports on Saturday, the continuous rain had increased the volume of the Mae Klang waterfall in Doi Inthanon National Park and caused runoff. The area had received an average of 110 millimetres of rain per hour.
Roads, including Highway 108 (Chiang Mai-Hot), and four villages in tambon Khuang Pao were inundated. Drainage was slow on roads, including Highway 108, forcing motorists to avoid some lanes and leading to traffic congestion, the reports said.
Personnel and equipment have been mobilised to speed up drainage in homes. Conditions were expected to return to normal on Saturday, as water levels in many areas started to recede.
Local authorities have yet to estimate the cost of the flood damage.