The death toll from the worst flooding to hit India's Kerala state in a century has jumped to 357 with losses to infrastructure pegged at almost $3bn.

The idyllic tourist hotspot has been badgered by torrential monsoon rains since the end of May, triggering landslides and flash floods that have swept away entire villages.

"Since May 29, when the monsoon starts in Kerala, a total of 357 people have lost their lives until now," a statement from the state's information officer said on Sunday, with 33 losing their lives over the last 24 hours.

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