As forecast, the worst weather of the weekend descended on Phillip Island on Sunday, causing the cancellation of MotoGP warm-up as well as the Moto3 and Moto2 races.
The MotoGP race was moved to a new provisional pit lane opening time of 4pm, but was then also cancelled.
After a dramatic Saturday, Marc Marquez leads the world championship heading into Sunday's final Australian MotoGP at the legendary Phillip Island circuit.
With main title rival Jorge Martin ruled out by injury, Marquez is guaranteed to stay on top whatever happens in today's race.
Martin fractured his forearm after falling during an intense victory duel with Marquez in the Sprint.
Aprilia's Saturday then got even worse when defending Phillip Island winner Raul Fernandez was also declared unfit due to a recent finger injury.
That means, while the front row of pole qualifier Marc Marquez, Alex Marquez and Johann Zarco is unchanged, home hero Jack Miller now heads row two alongside Pedro Acosta and Fabio di Giannantonio.
The grid order was decided by a wet qualifying, before the dry Sprint.
However, the worst weather of the weekend is forecast for Sunday, with Phillip Island set to give MotoGP a wet and wild farewell.
Many of the MotoGP riders - including Johann Zarco, Enea Bastianini and Fabio Quartararo - are shaking the hands of the marshals and posing for photos with the fans as they make their way back to the garages.
The bikes are now being wheeled off the main straight and riders starting to head back to the pits.
Marco Bezzecchi: "It's an emotional moment and not the way we wanted to finish our story with Phillip Island, but it's something we cannot control.
"The love and passion from the fans out here in the rain all day was unbelievable, so a huge thanks to them."
Bezzecchi also admits the lost race is further bad news for his slim title hopes.
Marc Marquez also apologises to the fans over the circuit comms.
He says track conditions were acceptable to ride, but the visibility issues preventing the use of the medical helicopter meant it wasn't possible for safety reasons.
Marquez took the title lead by ten points from Jorge Martin in the Sprint, but was unable to increase his advantage over the absent Martin due to today's cancellation.
After a big stoppie on the home straight, Jack Miller parks his Pramac Yamaha and heads over to the fans in the grandstand, where he throws his gloves and boots, then speaks to the fans over the circuit comms.
"This is not good," says an emotional Miller.
"You guys have sat through some shit today, and I'm sorry for that.
"It's a tough pill to swallow.
"You guys deserve better. You sat through traffic and dog shit weather."
Jack Miller pulls out all of his tricks - wheelies, stoppies, burnouts - to try and entertain the Australian fans who have braved the weather but have sadly missed out on any Sunday action.
Visibility may have been the official reason, but seeing the huge amount of spray being thrown on the parade lap, it's not hard to imagine the race being cancelled even if the helicopter could fly.
So this is it, MotoGP's last lap at the Phillip Island circuit.
The track is soaking wet but again, the race wasn't cancelled due to track conditions as such, but due to the lack of visibility affecting the operation of the medical helicopter.
The riders are leaving the pits for their parade lap. Jack Miller waves to the fans, but his disappointment is clear.
Jack Miller's face did say it all.
The final Phillip Island MotoGP race, before the Australian Grand Prix moves to Adelaide next season, has now been officially cancelled:
MotoGP statement: 'Due to limited visibility affecting the operation of the medical helicopter at the Red Bull Grand Prix of Australia, the MotoGP Grand Prix race has been cancelled.
'As a farewell to the Island, the MotoGP riders will do a lap behind the safety car and stop on the main straight to greet the fans.
'Pitlane will open for the farewell lap at 15:45 local time.'
The MotoGP riders are getting their leathers and wet weather gear on in the pits, including home star Jack Miller, who is in special 'green and gold' Australian colours.
Miller gives a sad shrug to the cameras; Let's hope he's simply reflecting the delay, rather than knowing something about the final 'race or not' decision...
Aprilia team manager Paolo Bonora gives an update on injured MotoGP title contender Jorge Martin's condition to MotoGP pit lane reporter Jack Appleyard:
"The crash was huge, but now he is in a good situation. We will check in the next few days but this morning he is in a quite good mood.
"At the moment, surgery is not necessary. We're just waiting to see how the situation evolves, but as I said, Jorge looked quite positive this morning."
Is Sepang possible next weekend?
"We will work for [it], absolutely. And he is the first to work for this goal, but we have to wait for the medical updates. We have to follow the medical [advice], but we are quite positive on that."
Rain is still falling, but the delays have been due to visibility rather than the amount of water and there is still heavy cloud overhead at the moment.
After a wet and wild start to the final day of MotoGP action at Phillip Island, bikes are now being warmed up as teams prepare for the delayed 4pm start time.