Flash flooding in east and central Sri Lanka has forced 175,000 people from their homes.
Heavy rains on Sunday and Monday caused a reservoir to burst its banks in the eastern district of Batticaloa, where more than 150,000 people were displaced, officials said.
The central district of Polonnaruwa was also badly hit. A further 6,500 people were displaced, particularly in the north.
The flood comes a week after rising waters forced 20,000 people out of their homes mainly in the district of Ampara, when monsoon rains intensified.
Most of those people have since returned home.
Ramya Siriwansa, deputy director of emergency operations at the National Disaster Management Centre, said: "A water tank has broken its banks in Batticaloa. There are 175,025 people displaced.
"Many are with friends and relatives, others are in camps and sheltering in schools and temples."
Flooding and displacement are common in Sri Lanka, where a southern monsoon batters the island between May and September, and a northeastern monsoon runs from December to February.
Batticaloa, on the eastern seaboard, was badly affected by the 2004 tsunami. The third anniversary of a disaster that left 35,000 people dead and missing in Sri Lanka alone is two days away.
Flooding and drought are cyclical in the Indian Ocean country.
In January, about 60,000 people were displaced by floods, with the southeastern district of Hambantota badly hit.
More than a dozen people were killed by landslides in the central hills at the time, hundreds of houses were damaged and thousands of people were stranded in makeshift welfare centres.