New Zealand and Australia have been able to send military surveillance flights to Tonga to assess the damage a huge undersea volcanic eruption left in the Pacific island nation.
A towering ash cloud since Saturday’s eruption had prevented flights from leaving earlier than Monday.
New Zealand hopes to send essential supplies, including much-needed drinking water, on a military transport plane on Tuesday.
A British woman who was missing has been found dead, her family said, in the first reported fatality on Tonga.
Nick Eleini said his sister’s body had been found and that her husband survived.
“I understand that this terrible accident came about as they tried to rescue their dogs,” Mr Eleini told Sky News.
He said it had been his sister’s “life dream” to live in the South Pacific and “she loved her life there”.
Communications with Tonga remained extremely limited. The company that owns the single underwater fibre-optic cable that connects the island nation to the rest of the world said it likely was severed in the eruption and repairs could take weeks.
The loss of the cable leaves most Tongans unable to use the internet or make phone calls abroad. Those that have managed to get messages out described their country as looking like a moonscape as they began cleaning up from the tsunami waves and volcanic ash fall.
Tsunami waves of about 80 centimetres (2.7 feet) crashed into Tonga’s shoreline, and New Zealand Prime Minister Jacinda Ardern described damage to boats and shops on Tonga’s shoreline. The waves crossed the Pacific, drowning two people in Peru and causing minor damage from New Zealand to Santa Cruz, California.
No casualties have been reported on Tonga, although there were still concerns about people on some of the smaller islands near the volcano.
Scientists said they did not think the eruption would have a significant impact on the Earth’s climate.
Satellite images showed the spectacular undersea eruption on Saturday evening, with a plume of ash, steam and gas rising like a giant mushroom above the South Pacific waters.
A sonic boom could be heard as far away as Alaska and sent pressure shockwaves around the planet twice, altering atmospheric pressure that may have briefly helped clear out the fog in Seattle, according to the National Weather Service.
Large waves were detected as far away as the Caribbean due to pressure changes generated by the eruption.
Samiuela Fonua, who chairs the board at Tonga Cable Ltd which owns the single cable that connects Tonga to the outside world via Fiji, said the cable appeared to have been severed about 10 to 15 minutes after the eruption. He said the cable lies atop and within coral reef, which can be sharp.
Mr Fonua said a ship would need to pull up the cable to assess the damage and then crews would need to fix it. A single break might take a week to repair, he said, while multiple breaks could take up to three weeks.
He added that it was unclear yet when it would be safe for a ship to venture near the undersea volcano to undertake the work.
A second undersea cable that connects the islands within Tonga also appeared to have been severed, Mr Fonua said. However, a local phone network was working, allowing Tongans to call each other. But he said the lingering ash cloud was continuing to make even satellite phone calls abroad difficult.
The cable also broke three years ago, possibly due to a ship dragging an anchor. At first Tongans had no access to the internet but then some limited access was restored using satellites until the cable was repaired.
Ms Ardern said the capital, Nuku’alofa, was covered in a thick film of volcanic dust, contaminating water supplies and making fresh water a vital need.
Aid agencies said thick ash and smoke had prompted authorities to ask people to wear masks and drink bottled water.
One complicating factor to any international aid effort is that Tonga has so far managed to avoid any outbreaks of Covid-19. Ms Ardern said New Zealand’s military staff were all fully vaccinated and willing to follow any protocols established by Tonga.
Dave Snider, the tsunami warning coordinator for the National Tsunami Warning Centre in Palmer, Alaska, said it was very unusual for a volcanic eruption to affect an entire ocean basin, and the spectacle was both “humbling and scary”.
The US Geological Survey estimated the eruption caused the equivalent of a magnitude 5.8 earthquake. Scientists said tsunamis generated by volcanoes rather than earthquakes are relatively rare.
“We are praying that the damage is just to infrastructure and people were able to get to higher land,” she said.
The explosion of the Hunga Tonga Hunga Ha’apai volcano was the latest in a series of dramatic eruptions. In late 2014 and early 2015, eruptions created a small new island and disrupted international air travel to the Pacific archipelago for several days.
Earth imaging company Planet Labs PBC had watched the island in recent days after a new volcanic vent began erupting in late December. Satellite images showed how drastically the volcano had shaped the area, creating a growing island off Tonga.