More than 2,000 houses in five districts, 10,000 rai (4000 acres) of paddy fields and local roads in Phatthalung are under water with classes at more than 10 primary schools suspended.
In Narathiwat province, three days of rainfall sharply increased the water level in the Su-ngai Kolok River which may overflow its banks if the rain continues.
Three schools in Yasla's Raman district remained closed due to heavy rains and floods. Water spilled over some sections of the Pattani and Saiburi riverbanks.
Yala Governor Dejrat Simsiri ordered relief officials on 24-hour alert and to work closely with the military in assisting flood-stricken people.