03/12/2016 6:20 PM AEDT | Updated 03/12/2016 8:48 PM AEDT

Thousands Without Power As 'Very Dangerous Storm' Hits Queensland

The Bureau of Meteorology has issued warnings for NSW and Queensland.

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Heavy rain, hail and thousands without power as severe thunderstorms sweep through south-east Queensland. The Bureau of Meteorology told residents in the state to expect a "very dangerous storm".

"There are severe thunderstorms throughout south-east Queensland with storms through the central interior," Dean Narramore, from The Bureau of Meteorology Queensland, told The Huffington Post Australia.

"There will be damaging winds large hail for at least a couple of hours."

A teenager has been struck by lightning while holding a metal door in the front section of the house, the ABC reports.

Buckets poured on Brisbane as 20mm of rain fell between 5.00 and 6.30 pm Saturday evening. Over 20000 homes are without power, according to Energex.

As well as dangerous storms, Queensland has seen temperatures above 40 degrees Celsius over the weekend.

"A heatwave continues throughout the state with temperatures of up to 45 degrees again out west... coastal locations have been saved by sea breeze but it's very hot inland land," Narramore said.

In NSW a warning has been issued for the north-east of the state.

"Storms have been triggered by a lot of moisture and a trough. Residents should prepare for large hail and damaging winds." Ashleigh Lange, from The Bureau of Meteorology New South Wales, told The Huffington Post Australia.

"Tomorrow we expect more thunderstorms, particularly in Northern Tablelands and Northern Ranges."

Bureau of Meteorology New South Wales

The State Emergency Service and Queensland Fire and Emergency Services advise residents to move cars under cover or away from trees, secure loose outdoor items, and never drive, walk or ride through flood waters.