Several houses were flooded and vehicles swept away after a portion of a feeder tank of the Kerala Water Authority (KWA) collapsed at Thammanam here early Monday, officials said.
How robots may eradicate manual scavenging in India.
Over 7.24 lakh displaced people have been sheltered in 5,645 relief camps dotting the state, they said.
The Centre said that there was no legal provision to declare a disaster as a national calamity, amid demands for declaring the floods as a national disaster.
The situation in the state was 'extremely grave', said Vijayan, who spoke to Prime Minister, Narendra Modi and Home minister, Rajnath Singh, this morning seeking more central assistance for relief operations.