Lisala Folau said he was painting his home in Atata - an isolated island of about 60 people - when his brother warned him about the tsunami, which hit land at about 7pm local time following an undersea volcanic eruption.

The waves soon inundated his lounge.

Mr Folau, who is disabled and has trouble walking, tried to escape by climbing on a tree but when he got down another big wave carried him out to sea.

'Waves kept coming'

But he said that his faith in God got him through the ordeal.

Speaking to Sky News, he said: "The scariest part was when the waves took me from land and into the sea.

"What came to my mind when I was helpless at sea was two things… one: that I still had faith in God, and two: my family.

"And I only remembered how my family would think at that moment… 'maybe he died'."

"No man can withstand the power of nature," he said, adding: "What we need to understand is how we react when it comes. For me, I just want to be cool and calm when it comes."

He previously told Tongan media agency Broadcom Broadcasting: "I just floated, bashed around by the big waves that kept coming."

He said he kept floating and slowly managed to swim 7.5km to reach the shore of Tongatapu, the main island, at about 10pm on Sunday.

The story of his journey went viral, with one Facebook user calling him a "real life Aquaman" - a reference to a comic book character.

"He's a legend," said another post.

Atata 'almost completely destroyed'

The eruption of the Hunga Tonga-Hunga Ha'apai volcano led to the deaths of at least three people and damaged the majority of homes on several islands.

Communications were knocked out for the nation of 105,000 people, cutting it off from the rest of the world, while most of its drinking water has been spoiled.

The United Nations said that about 84,000 people - more than 80% of the population - have been badly affected by the disaster.

Tongan naval boats are still evacuating people from smaller islands to the larger ones.

Atata, which is about 8km northwest of Tonga's capital Nuku'alofa or a 30-minute boat ride, was almost completely destroyed.

The first planes carrying foreign aid have arrived and a state of emergency was declared.

The Queen also sent a message of condolence to the King of Tonga, saying she was "shocked and saddened" by the disaster.