Gold Coast theme park Sea World and a nearby resort have been evacuated and water bombing is set to begin after a grassfire broke out.
An emergency situation has been declared and six crews are fighting the blaze which is burning near Seaworld Drive on The Spit
"Due to the fire hazard in the vicinity of Sea World Resort, if you are in the resort grounds and see this post, please immediately go to reception," Sea World tweeted on Saturday.
The evacuation comes as temperatures in the Gold Coast area track towards a top of 31 degrees on Saturday, with thousands of school leavers expected to descend on the nearby Surfers Paradise strip.
"Ground crews are working to contain the blaze which started this morning and water bombing operations will begin shortly," Queensland Fire and Emergency Services said.
"Residents nearby are advised to close windows and doors and keep medication on hand if suffering from a respiratory illness."
There are no reports of people being injured.
Meanwhile, residents in Western Australia's south are being warned to prepare to defend their homes after a flare-up of the Merivale bushfire.
People living in the areas of Stockyard Creek and Mullet Lakes are warned the fire poses a possible threat to lives and homes.
The fire is contained but not under control and is slowly burning in a south-westerly direction.
"The fire is burning in bushland between Kirwan Road, Fisheries Road, Jim Ovens Road, Dunn Rock Road and the Esperance coastline," WA's Department of Fire and Emergency Services said in a statement.
"The fire has flared up on the western side of the fire."
Official advice for the fire was downgraded to watch and act alert overnight but has since been revised up.
More than 200 firefighters and 100 pastoralists have been fighting this and two other fires across the Shire of Esperance.
Advice alerts also in place for Salmon Gums and Grass Patch to the north of the coastal town and the Thomas River-Poison Creek area of Cape Arid National Park to the east.
There is also a severe fire warning for parts of the Pilbara, the Goldfields Midlands and Midwest Gascoyne with the Bureau of Meteorology forecasting hot, dry and windy conditions.
The Salmon Gums and Grass Patch fire left four people dead, including local farmer Kym Curnow, who was hailed as a hero for saving several people from driving into the inferno before becoming trapped himself.
Norwegian national Anna Sashohova Winther, 29, British man Thomas Leslie Butcher, 31, and German woman Julia Kohrs-Lichte, 19, also died trying to outrun the fire.
Also in the state's south, the Department of Parks and Wildlife is conducting a hazard reduction burn about 20km northeast of Manjimup.
- AAP