Distance, volcanic ash at airport delay aid to Tonga: UN

United Nations: Thick ash on airport runways is delaying the aid deliveries to the Pacific island nation of Tonga, where significant damage was being reported days after a huge undersea volcanic eruption and tsunami, the UN humanitarians said.

Although needs assessment has expanded for Tonga volcano disaster relief while aid efforts have also scaled up, delivery is however being delayed by distance and ash-laden runways.

The UN Office for the Coordination of Humanitarian Affairs (OCHA), citing Tongan authorities, said that water, food and restoration of communications top the list of needs, but it will be days before naval ships from Australia and New Zealand can arrive and dock on the main island of Tongatapu, reports Xinhua news agency.

The January 15 massive eruption affected 84,000 people, or 80 per cent of the population, OCHA said, adding that the casualty count remains at three dead and an unknown number of people injured.

While 90 per cent of electricity on Tongatapu is back up, volcanic ash blocks runways at the international airport at Nuku'alofa, the capital city. They are expected to be cleared by Thursday, said OCHA.

Domestic phone service operates only within Tongatapu and 'Eua islands.

When foreign relief can be delivered it is expected to be on a hands-off basis because of the island kingdom's strict anti-Covid protocols.

It is one of the few Covid-free countries in the world.

"The UN is concerned about the islands of Mango, Fonoifua, and Nomuka which have been severely impacted, though sparsely populated," the OCHA said.

Surveillance flight data showed up to 100 houses were severely damaged on the main island and about 50 on 'Eua, OCHA said.

Tongan authorities are conducting search-and-rescue operations and have sent two vessels carrying health teams and water, food and tents to the Ha'apai island group, where Mango, Fonoifua and Nomuka are located.

The humanitarian office said the Tongan Red Cross Society and other local partners are distributing emergency water, food rations, shelter and kitchen supplies.

Unicef is shipping water and other supplies with Australia's HMAS Adelaide, but the ship won't leave for Tonga until Friday.

Japan announced an emergency grant of more than $1 million along with a pledge to send relief supplies and equipment, OCHA said.

The Red Cross Society of China will provide $100,000 in cash and humanitarian assistance.