By Robyn Wuth in Brisbane

Tens of thousands are still without power and insurance claims continue to soar after days of catastrophic superstorms pummelled the country’s east coast. 

The damage bill is expected to surge into the millions, as the Insurance Council of Australia confirmed claims have reached 27,800 and continue to climb.

Two consecutive days of superstorms were declared a catastrophic event as the Bureau of Meteorology warns residents to brace for more dangerous weather.

Dangerous thunderstorms battered southeast Queensland and northern NSW on Monday and Tuesday, dropping giant baseball-sized hail in the worst-affected areas.

Cyclonic winds toppled trees and brought down powerlines, shutting roads and forcing schools to close with repairs still underway on Wednesday.

More than 162,000 properties were left without power following the most dangerous storms on Monday, with another 11,500 plunged into darkness after the Tuesday storms.

Crews are working around the clock to repair the damage but almost 33,000 people are still without power, with the worst-affected areas including Moreton Bay, Noosa and the Sunshine Coast north of Brisbane.

Repairs were delayed as severe storms again hammered the region on Tuesday night, prompting another 530 calls to the State Emergency Service.

Brisbane bore the brunt of Tuesday night’s second wave of damage from a storm system stretching as far south as NSW’s Hunter Valley, with 169 SES calls for help, followed by 148 from Moreton Bay.

Up to 110mm of rain was dumped on some areas.

There is no reprieve for the east coast as dangerous storms are predicted to hit again late on Wednesday.

“Severe storms are possible right along the coast,” Bureau of Meteorology’s Miriam Bradbury said.

“That extends from the southern parts of the Cape York Peninsula all the way through the eastern districts of Queensland and into the southeast, then pushes down across northeast and central NSW.

“So really, for communities which have already seen a few days of very strong, severe storms, this is yet another day of very unsettled weather.”

Large parts of Queensland continue to swelter under heatwave conditions, with temperatures six to 10 degrees above the November average.

Meanwhile, a cold front moving across southern parts of the nation is expected to trigger stormy conditions and damaging winds across parts of South Australia and Victoria.

“That’s catching the southeastern parts of South Australia, possibly reaching some of those southern Adelaide suburbs and then pushing across most of Victoria, including Melbourne.”

Ex-Tropical Cyclone Fina was downgraded overnight and is impacting the northern parts of Western Australia’s Kimberley region with heavy rainfall and the risk of flash flooding.

“We’re going to continue to see the impact of this ex-tropical cyclone over the next day or two, even though it’s lost that cyclonic category,” Ms Bradbury said.

The clean-up continues in the Northern Territory after Cyclone Fina felled trees, caused power outages and damaged buildings as it swept through on the weekend as a category three system.