Patches of heavy rain are likely for at least the next two days in Brisbane after devastating hail hit parts of south-east Queensland on Saturday.

Heavy rain, lightning and hail lashed the south-east on Saturday, with multiple people injured.

Up to 40 millimetres fell during a short burst in Brisbane, with wind speeds of more than 100 kilometres per hour recorded. In some parts of the Darling Downs rainfall was well over double that.

The biggest hailstones reported across the south-east were about nine centimetres in diameter – bigger than a cricket ball.

“That’s uncommon … that’s not just a standard storm,” Bureau of Meteorology senior forecaster Angus Hines said.

“The atmospheric conditions all have to align, and you need a very powerful storm before that becomes possible.”

More than 277 calls for help were made to the SES, with most for damaged and leaking roofs.

At the 150th anniversary fair at Esk State School, north-west of Brisbane, paramedics treated nine people for injuries. Four were taken to hospital.

Images posted to social media showed some small food trucks and buildings were badly damaged.

“We’re all okay … unfortunately we’ve sustained significant damage and will be closed until further notice,” vendor Devilish Doughnuts said.

Krunchy Kandy employee Caleb sustained a gash to his head and possible broken hand while attempting to help other business owners pack up during the downpour.

Attorney General Deb Frecklington, who represents Esk as the member for Nanango, wished a swift recovery to the injured patrons and thanked everyone who helped in the crisis.

“Thanks to all who assisted and thoughts with those who were injured and [stallholders] who lost their wares,” she said in a community statement.

Premier David Crisafulli also thanked emergency workers on Sunday morning.

“We’re prepared for this and overwhelmingly so too are Queenslanders, and I think that’s what makes the state so resilient – the ability to be able to deal with what Mother Nature throws at us,” he said.

Thousands were without power immediately after the storm across south-east Queensland, but fewer than a dozen outages remained on Sunday morning.

Inner Brisbane was spared the worst of the downpour, with a severe but brief lashing about 3pm clearing to sunshine just over an hour later.

“Some places get by with sort of minor glancing impact, which seems like that was the case there,” Hines said.

More rain is forecast on Monday and Tuesday, with temperatures across the south-east expected to drop well below average.