Emergency services have been trying to locate six people in the NT who are unaccounted for in the NT after heavy rain, as three tourists who had their vehicle carried away by floodwaters were found safe.
Brendan Muldoon, duty superintendent with NT Police, has confirmed to SBS a tourist who was believed trapped in a vehicle in Araluen, south of Alice Springs, has been found.
The person is believed to be a Japanese tourist, although the identity hasn't been confirmed. Two others were able to escape from the moving vehicle as it washed off the causeway on Larrapinta Drive into the Hugh River..
"All are safe, with only minor injuries reported," NT police said in a statement.
"One female and two male occupants of the vehicle are being transported to Alice Springs Hospital for assessment."
NT Police earlier held grave concerns after the car disappeared.
"We're told by witnesses it rolled over a couple of times and was wedged up against a tree," Superintendent Muldoon told a press conference earlier.
Emergency services and a flood boat were sent to the scene.
He urged others "not to cross flooded causeways, not enter flooded rivers".
"The southern part of the Northern Territory is experiencing extreme weather from the tropical low that has come across from Western Australia - we're just urging all tourists, all motorists in the area, to not enter flooded causeways."
Six others, including an infant, remain missing in the territory's far west, after they did not arrive at their NT destination of Kintore after leaving the Kiwirrkurra in Western Australia on Chirstmas Day. They were travelling in two cars.
Search efforts have been hampered by the extreme weather, with police hoping to carry out an aerial search of the area now that conditions have improved.
"This section of Australia is extremely remote, there's no phone reception," Superintendent Muldoon said.
"We believe they are from a remote indigenous community, we're not sure what resources they have.
"We're seriously concerned for their welfare and are putting all our efforts to making sure we get out there as soon as we can," he added.
The flash flooding swept the outback, forcing evacuations and the Uluru national park to close on Boxing Day.
The park has reopened Tuesday after record-breaking rain.
The Walungurru district recorded 232mm of rain in 24 hours, cutting off roads and washing out walking tracks.
Park Manager Mike Misso said rangers had been out assessing damage from the deluge since 5.30am on Tuesday.
"We're doing some works today to secure some of the more popular walks, so the park's definitely open but there will be some areas that remain closed due to heavy erosions on the walking tracks," Mr Misso said.
All vehicle tracks in the park have also reopened.
Mr Misso said the rainfall event wasn't entirely unexpected, as summer is technically the wet season even in the country's arid centre.
However the extent of the event had caught even locals by surprise.
"Speaking to some of the rangers who've been here a long time they haven't seen rain like this for several years," Mr Misso said.
There was 61.4mm of rain in one hour on Christmas night alone, which the Bureau of Meteorology described as a one-in-50-year rainfall event.
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Record-breaking rain shuts Uluru
Twenty-five houses in the community of Kintore were flooded and dozens were evacuated at the height of the flooding.
The town square of Yulara was flooded and had to be pumped out by the local fire service.
Mr Misso said the upside was the inundation would provide Uluru visitors with spectacular views.
"The desert landscape is like a sponge, it sucks up the water very rapidly," he said.
"What we'll see over the next few weeks and months is an explosion of rich vegetation. The desert will bloom."
