The total area destroyed by the Kangaroo Island bushfires now stands at 200,000 hectares which is almost half the island, the Country Fire Service has confirmed.

Key points: Major bushfires burning on Kangaroo Island have ripped through 171,000 hectares

Major bushfires burning on Kangaroo Island have ripped through 171,000 hectares The CFS said there had been no reports of missing persons following the latest emergency

The CFS said there had been no reports of missing persons following the latest emergency There have been reports of property damage at Vivonne Bay

Deteriorating conditions saw the Ravine fire flare up again on Thursday with fire fronts threatening two townships amid extreme heat and strong winds.

The threat has now been downgraded to an advice message which is current for most of the island, but the CFS is urging people to take heed of warnings.

CFS chief officer Mark Jones said there had been no reports of missing persons on the island and two firefighters sustained minor injuries last night — taking the total number of injuries to firefighters on the island to 22.

"The state has been remarkably lucky that more people have not been killed or injured in what has been the worst season we've endured in living memory," he said.

There are currently 280 personnel on the ground, including 230 firefighters in 60 fire trucks.

A further 55 firefighters are on their way to the island from Adelaide.

Evacuees wait at the Kingscote jetty for roads to reopen. ( ABC News: Casey Briggs )

Mr Jones said despite disastrous forecasts, the township of Parndana had been protected.

There have been reports of property damage at Vivonne Bay, including SeaLink's lodge.

In a statement, SeaLink said the lodge had been safely evacuated and the full extent of damage was not yet known.

A bushfire approaches the town of Parndarna, Kangaroo Island, on Thursday. ( Instagram: Trent Lawson/tmanadventure )

The CFS said the full extent of damage across the fireground was still being assessed by crews.

Conditions have improved today and at 12:20pm almost 4 millimetres of rain had fallen Kingscote, with temperatures also dropping and humidity increasing.

Overnight, many residents and tourists evacuated to Kingscote where they spent a sleepless night on the town's oval and close to the jetty.

Evacuees and residents have been stranded with many road closures still in place.

Volume, ferocity of bushfires 'simply unprecedented'

ABC reporter Casey Briggs, who is on Kangaroo Island, said it had been a, "long sleepless night for many".

"After the emergency warning was extended to just west of Kingscote, the island's biggest town, residents started moving in to safer ground — many going to the relief centre at the oval, others to the Kingscote jetty wanting to stay near the water," Briggs said.

"People have been arriving through the night. It's smoky, there's ash in the air and it's also been lightly raining this morning and conditions remain erratic."

Acting Police Commissioner Linda Williams said it was important to note the fires on Kangaroo Island are just one of a number of bushfires that have occurred across South Australia this summer.

"I can only say these have been challenging and they've tested the resolve and the resilience of our emergency services workers," she said.

"The volume and ferocity of the bushfires we have experienced are simply unprecedented."

Local MP Leon Bignell helped the owner of the Ozone Hotel in Kingscote set up cots for evacuees overnight. ( Facebook: Leon Bignell )

Mawson MP Leon Bignell spent the night at Kingscote and said the town's population swelled overnight as evacuees arrived.

He also evacuated to the Kingscote Oval in the middle of night.

Earlier in the evening, he had helped the owner of the Ozone Hotel put up cots in its dining room — which had hours previously hosted a wedding dinner — for the Salvation Army, who had been evacuated from the emergency staging area at the airport.

"There were people there [at the oval] with horses, with dogs, with kids, there were overseas tourists there and then I got a message from Mary-Lou Corcoran who runs the Ozone Hotel … she said come down, we've got a spare cot," he said.

"We'd actually helped her a few hours earlier set up a whole heap of cots or stretchers in the dining room."

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Smoke, ash reaches Adelaide

Adelaide Oval will host a Bushfire T20 Showdown cricket match featuring players from the Adelaide Crows and Port Adelaide football clubs.

Port Adelaide players Tom Jonas and Travis Boak and Adelaide players Rory Sloane and Taylor Walker are among the AFL stars who will participate in the game on Sunday, February 2.

Some of "cricket's biggest names" will also join in the match, Adelaide Oval said in a statement.

All proceeds from ticketing, catering, sponsorship and donations for this match will go to the State Government's SA Bushfire Appeal, which will raise funds for people directly affected by the Cudlee Creek and Kangaroo Island bushfires.

SA Health said smoke drifting across South Australia this morning could be some of the heaviest seen during recent bushfires.

It has warned people to stay inside, avoid opening doors and windows and to switch car air conditioners to recirculate.

While the smoke has begun to ease, chief public health officer Nicola Spurrier said people should take extra care.

"People with existing heart and lung conditions, such as asthma and chronic bronchitis, emphysema or heart disease and angina, they're all more vulnerable to the effects of smoke and so we do advise it's very important that these people stay indoors where possible," she said.

Kat Koopman who lives in Adelaide, shot footage of ash from the Kangaroo Island bushfires, falling at her home.