A young girl has died in Brisbane, two bodies were found in Moreton Bay and one in the Mary River, while two more people are missing after storms in Queensland.

The number of people killed by storms in southeast Queensland has risen to five and another two people are still missing in floodwaters and at sea.

Queensland Ambulance Service on Wednesday said two people had been found dead after a boat capsized at Moreton Bay on Tuesday afternoon with 11 people on board.

Police later confirmed the deceased were two males aged 49 and 16.

Paramedics transported eight people to hospital in a stable condition and one person remains unaccounted for after the incident near Green Island.

A search and rescue operation launched involving water police vessels, police divers, volunteer marine rescue and coastguard had resumed at first light on Wednesday.

The body of a nine-year-old girl was found on Tuesday evening after she was lost in stormwater drains in Brisbane.

A fourth, that of a 40-year-old woman, was found in the Mary River in Gympie.

The Christmas storms had already accounted for one death on Monday when a 59-year-old woman was killed when she was hit by a fallen tree on the Gold Coast.

The girl’s body was located following an extensive search, said police, who added they did not believe there were any suspicious circumstances.

The statement added the family, from Rochedale South, “are requesting privacy at this difficult time”.

The woman recovered from the Mary River was one of three swept into the water by the Kidd Bridge. One woman, a 46-year-old, managed to get to safety. Another 46-year-old woman is missing with the search due to resume this morning.

Severe weather had lashed parts of Queensland’s southeast on Christmas and Boxing Day.

At Gympie a wind gust of 100km/h was recorded on Tuesday while golf ball-sized hail was spotted at Zillmere in Brisbane’s north.

At Jindalee in Brisbane’s southwest 62mm of rain was recorded in an hour.

On Christmas Day, storms left more than 120,000 households without power and some were still cut off with more than 800 powerlines down across the southeast.

The Bureau of Meteorology said some further severe thunderstorms are possible on Wednesday around central and northern parts of the Queensland coast, and potentially reaching south to Brisbane.

However, by Wednesday afternoon conditions are expected to ease.

Heatwave conditions in the state’s north have prompted warnings from meteorologists, with maximum temperatures across the Gulf region expected to reach the low 40s on Wednesday.

Flash flooding

One woman has died after a campground in regional Victoria was hit by flash flooding and another has been rescued from a river, as storms continue to batter the state.

Emergency workers were called to the Buchan campground in east Gippsland just after 5pm on Tuesday.

“Police were told a number of vehicles in the campground area were underwater and a number of people were safely retrieved from a nearby bridge,” police said in a statement on Tuesday night.

The woman was found dead at 6.45pm, and she is yet to be formally identified.

Another woman was rescued by police after being seen clutching onto a tree in rapid waters.

The 29-year-old had made her way into the Werribee River on Tuesday to rescue her dog Minka, which was swept away around 1.30pm.

She lost her footing and was taken 20m downstream while trying to pull the dog out of deep waters.

Water Police and Search and Rescue members pulled Minka and the woman onto the riverbank, where they were found not to be seriously injured.

Earlier on Tuesday, a man was killed after a branch fell on his property in Caringal.

“Emergency services provided medical assistance however the 44-year-old Bunyip man died at the scene,” Victoria Police said in a statement.

The state continued to be battered by thunderstorms and remained on flood watch on Boxing Day after a wet Christmas.

Flood warnings remain across parts of the state, including for the Avoca River as floods are likely to peak at seven metres on Wednesday morning.

The State Emergency Service has responded to more than 1000 assistance requests over the past three days.

The bulk of the calls came from Frankston, Shepparton, Bendigo and the state’s west but the focus was expected to shift to the east with several flood warnings issued, SES state agency commander Alistair Drayton said.

Downed trees, particularly across roads, as well as water entering houses, made up a large number of the calls.

– AAP