Live updates: Cyclone Fina has 'largely minimal impact' but intensifies again towards north-east of Western Australia's Kimberley Coast; Winds of up to 165km/h and gusts to 230km/h reported

Thanks for following today's coverage.Territorians are contending with the cyclone clean-up as locals in remote communities on Western Australia's Kimberley Coast prepare for the approaching category 4 storm.

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NT Police Commissioner Martin Dole and Territory Controller Martin Dole said the Tiwi Islands saw "more of a brunt" than Darwin as a result of Tropical Cyclone Fina.

"The assessment today is that Milikapiti was not affected, Pirlangimpi was not affected, Wurrumiyanga did have some damage to some infrastructure, particularly the power infrastructure," Dole said.

"An assessment is being done on that this morning, and is continuing to be done throughout the day, by the power and water authority.

"It may be some days before they see full restoration of power on the islands."But no widespread damage to property or buildings and no reports of injuries, which is very pleasing."

The Tiwi Islands are north of Darwin with a population of almost 2350 people.

Finocchiaro praised residents for their cooperation during the cyclone.

"I just want to thank Territorians for how well they have cooperated and heeded all of the advice from our officials," she said.

"We acted really early with our emergency services right when this was a low pressure system.

"Then the territory stood up its emergency operations centre with the territory controller, that is the police commissioner moving into that role, where we've regularly updated Territorians around how important it is that they be prepared.

"This cyclone saw a Territory that was united and prepared for what was to come and as a result we've seen largely minimal impact and no injuries as a result."

Tropical Cyclone Fina has intensified into a category four system and is moving south-west towards the north-east Kimberley Coast.

The Bureau of Meteorology said the system is bringing sustained winds near the centre of 165 kilometres per hour with wind gusts to 230km/h.

The warning zone extends from Wadeye to Dundee Beach in the Northern Territory and NT/WA Border to Troughton Island, including Kalumburu in Western Australia.

School principals have been asked to visit their schools to assess whether it is safe for students to return tomorrow morning.

"Of course, families are really keen to understand whether or not they'll be sending their children to school tomorrow," Finocchiaro said.

"We very much want to make sure that we are returning to business as usual in a safe and measured way.

"So principals have now been asked to go and visit their schools if it's safe for them to do that and make those assessments school-by-school on whether or not they're fit to be welcoming students back in their doors first thing tomorrow morning.

"That will then be communicated to all parents across the afternoon so that all families have certainty around what tomorrow looks like."

More than 19,000 homes and businesses lost power in the last 24 hours.

Northern Territory chief minister Lia Finocchiaro said ground crews have been working tirelessly to restore electricity for residents as well as clean-up storm damage.

"The warnings have now been reduced and we want Territorians to be going back to their business as usual," she said.

"Obviously there remains to be significant debris and trees down and even powerlines.

"Territorians who need to move about for essential reasons such as re-stocking their fridges, having to take items to dump points and other necessary travel are encouraged to do so safely."

Darwin Airport has re-opened after being closed for more than 24 hours.

Qantas said the started flights again in and out of the city have started.

Extra services are also planned.

"We are also planning additional flights today to help get impacted customers on their way," a spokeswoman said.

"We're offering additional flexibility for customers whose flights were impacted, and we thank them for their patience."

The Bureau of Meteorology (BOM) has officially downgraded the threat level of the cyclone for Darwin in its latest update.

The city is no longer considered in the warning zone as of 10:30am local time, with warnings for the Tiwi Islands, Wurrumiyanga and the Cox Peninsula also removed.

"Wadeye to Dundee Beach in the Northern Territory and also NT/WA Border to Troughton Island, including Kalumburu in Western Australia" is still in the warning zone, according to official advice.

Northern Territory Emergency Services are still warning people in Darwin to exercise caution and to not enter floodwaters.

Cyclone Fina may be moving away from the coast but is picking up in intensity and still poses a threat to many communities.

The Bureau of Meteorology issued a recent update saying Darwin is still in the warning zone for the cyclone, as high winds and rains continue to pound the city.

The central and western Tiwi Islands and Cape Hotham to Wadeye are also included in the warning zone, with Pirlangimpi, Milikapiti and Wurrumiyanga also under an official warning.

Troughton Island in WA, as well as Kalumburu are in the watch zone.

An emergency hotline is available for people in impacted regions, and it is open from 7am to 7pm ACST.

It can be reached at 1800 888 901.

The Bureau of Meteorology (BOM) has released its first update on Cyclone Fina today.

It believes the cyclone will now reach category 4 intensity sooner than expected, warning it could reach this peak at about midday local time (1.30pm AEDT).

As it stands, the cyclone is moving slowly in a south-west direction away from Darwin, with winds of 150km/h and gusts of 205km/h.

Fina is now more than 100km from Darwin, with damaging winds of up to 120km/h expected in the city today, despite the eye of the storm moving away from the mainland.

Darwin could see up to 130mm of rain, according to BOM calculations.