Bangkok, Thailand (CNN) -- At least 21 people are dead after flash floods swept through eight provinces in southern Thailand, according to the country's Interior Ministry.
The flooding has affected more than 716,000 people, the country's disaster prevention agency said.
Villagers in one province, Krabi, have been asked to take shelter at temples or other areas, said a local official, Sombat Morakot.
"It rained severely in last couple of days," he said. "I have never seen something like this before. And when it rained, it flushed soil and logs down to villages."
Surat Thani, the largest of the southern provinces, has received 855 mm (34 inches) of rain since Saturday. The area typically gets 51 mm (2 inches) of rain during March.
CNN's Jennifer Delgado contributed to this report