The first death from a massive underwater volcanic blast near the Pacific island nation of Tonga has been confirmed, as the extent of the damage remained unknown Monday.
Tonga remained virtually cut off from the rest of the world, after the eruption crippled communications and stalled emergency relief efforts.
It is two days since the Hunga Tonga-Hunga Ha'apai volcano exploded, cloaking Tonga in a film of ash, triggering a Pacific-wide tsunami and releasing shock waves that wrapped around the entire Earth.
But with phone lines still down and an undersea internet cable cut -- and not expected to be repaired for weeks -- the true toll of the dual eruption-tsunami disaster is not yet known.
The first known death in Tonga itself was confirmed: that of a British woman swept away by the tsunami. She was identified as Angela Glover, 50, who lived in the Tonga capital with her husband James, Glover's brother Nick Eleini told British media.
Two women also drowned Saturday in northern Peru in big waves recorded after the volcanic blast, authorities there said.
Only fragments of information have filtered out via a handful of satellite phones on the islands, home to just over 100,000 people.
In one of the few communications with the outside world, two stranded Mexican marine biologists made a plea for help from their government, using a satellite phone provided by the British embassy to call their family.
"They said they were sheltering in a hotel near the airport and they asked us for help to leave the island," Amelia Nava, the sister of 34-year-old Leslie Nava, told AFP in Mexico.
Tonga's worried neighbors are still scrambling to grasp the scale of the damage, which New Zealand's leader Jacinda Ardern said was believed to be "significant".
Both Wellington and Canberra scrambled reconnaissance planes Monday in an attempt to get a sense of the damage from the air.
And both have put C-130 military transport aircraft on standby to drop emergency supplies or to land if runways are deemed operational and ash clouds allow.
There are initial reports that areas of Tonga's west coast may have been badly hit.
Australia's international development minister, Zed Seselja, said a small contingent of Australian police stationed in Tonga had delivered a "pretty concerning" initial evaluation.
They were "able to do an assessment of some of the Western beaches area and there was some pretty significant damage to things like roads and some houses," Seselja said.
"One of the good pieces of news is that I understand the airport has not suffered any significant damage," he added.
"That will be very, very important as the ash cloud clears and we are able to have flights coming into Tonga for humanitarian purposes."
Major aid agencies, who would usually rush in to provide emergency humanitarian relief, said they were stuck in a holding pattern, unable to contact local staff.
"From what little updates we have, the scale of the devastation could be immense -- especially for outlying islands," said Katie Greenwood, IFRC's Pacific Head of Delegation.
Even when relief efforts get under way, they may be complicated by COVID-19 entry restrictions. Tonga only recently reported its first-ever coronavirus case.
What is known is that Saturday's volcanic blast was one the largest recorded in decades, erupting 30 kilometres (about 19 miles) into the air and depositing ash, gas and acid rain across a swathe of the Pacific.
The eruption was recorded around the world and heard as far away as Alaska, triggering a tsunami that flooded Pacific coastlines from Japan to the United States.
The Tongan capital Nuku'alofa was estimated to be cloaked in 1-2 centimetres of ash, potentially poisoning water supplies and causing breathing difficulties.
"We know water is an immediate need," Ardern told reporters.
After speaking to the New Zealand embassy in Tonga, she described how boats and "large boulders" washed ashore.
Wellington's defense minister said he understood the island nation had managed to restore power in "large parts" of the city.
But communications were still cut. The eruption severed an undersea communications cable between Tonga and Fiji that operators said would take weeks to repair.
Tonga was isolated for two weeks in 2019 when a ship's anchor cut the cable. A small, locally operated satellite service was set up to allow minimal contact with the outside world until the cable could be repaired.