It is the worst natural disaster to hit the island in two decades, and officials said the extent of damage in the worst-affected central region was only just being revealed as relief workers cleared roads blocked by fallen trees and mudslides.
The Disaster Management Centre (DMC) said the death toll had risen to 334, up from 212 earlier on Sunday, with nearly 400 missing and more than 1.3 million people across the island affected by the record rains.
President Anura Kumara Dissanayake, who declared a state of emergency to deal with the disaster, vowed to build back with international support.
“We are facing the largest and most challenging natural disaster in our history,” he said in an address to the nation. “Certainly, we will build a better nation than what existed before.”
The losses and damage are the worst since the devastating 2004 Asian tsunami that killed around 31,000 people and left more than a million homeless.
Rain had subsided across Sri Lanka but low-lying areas of the capital were flooded on Sunday and authorities were bracing for a major relief operation.
A Bell 212 helicopter carrying food for patients stranded at a hospital just north of Colombo crashed into a river on Sunday evening. All five crew members were taken to a nearby hospital.
Another helicopter sent from India rescued 24 people on Sunday, including a pregnant woman and a man in a wheelchair, marooned in the central town of Kotmale, about 90 kilometres northeast of Colombo, officials said.
Pakistan was also sending rescue teams, the Sri Lankan Air Force said, while Japan will also send a team to assess Sri Lanka’s immediate needs and has pledged assistance.
The air force said two infants and a 10-year-old child had also been rescued from a hospital in the northern town of Chilaw, which was submerged on Saturday.
Authorities said flood levels in the capital would take at least a day to recede, while dry weather was also forecast. Cyclone Ditwah moved north towards India on Saturday. (AFP)
