At least 100 people have died in Sri Lanka due to floods and landslides in the country's south and western regions. "The impact of these early monsoon season downpours has been far more devastating than what we'd normally expect this time of year", Save the Children Country Director in Sri Lanka, Chris McIvor said. "The first ship will reach Colombo tomorrow morning".
The Indian rescue personnel are now being deployed to the disaster affected zone in coordination with Sri Lanka Navy and other Sri Lankan authorities.
"We have seen worst rainfall since the 1970s", said Dunesh Gankanada, deputy minister of Disaster Management Centre (DMC).
President Maithripala Sirisena, who returned from a state visit to Australia, rushed to Kalutara, just south of the capital Colombo, to supervise relief operations.
"Foreign Min @RavikOfficial received relief assistance".
At least 100 people were reported dead and more than 110 missing as record rainfall hit parts of the country on Friday, prompting calls by the government for worldwide aid.
Sri Lanka stepped up its military-led relief operations on Saturday as almost half a million people were displaced after a monsoon deluge killed at least 122 people and threatened more flooding.
Prime Minister Narendra Modi has directed provision of all necessary assistance.
Police spokesperson Priyantha Jayakody said after Thursday's rains, multiple landslides were reported in the western coastal district of Kalutara, the central southern district of Ratnapura, and the southern district of Matara.
Rain was expected to continue through the night, though "at a lesser intensity", according to meteorological department chief S.R. Jayasekera.
According to the High Commission statement, a second Indian ship, INS Shardul, has left Kochi and is scheduled to arrive at Colombo port on Sunday.
"People of Bulathkohupitiya, Deraniyagala, Yatiyantota, Dehiowita, Baddegama, Yakkalamulla, Neluwa, Thawalama, Bulathsinhala, Agalawatta, walallawita, Baduraliya, Kotapola, Pasgoda, Pitabeddara, Mulatiyana, Walasmulla and Katuwana areas are advised to evacuate", the report said.