Dreamworld accident could prompt reforms

A fatal ride accident at Dreamworld could prompt a tightening of workplace health and safety regulations at Queensland theme parks, the premier says.

About 30 detectives are involved in the investigation into Monday's tragedy, which claimed the lives of four people when a raft on the Thunder River Rapids ride flipped.

Workplace Health and Safety officers are also working in conjunction with police.

Premier Annastacia Palaszczuk on Thursday said the ride would remain a crime scene "for a few more days".

But the government needed to wait for the outcome of the police and coronial investigation before making any changes, she said.

"I don't want to pre-empt it, but if people have to face criminal prosecution, they will," she told ABC radio.

Asked whether the government would consider any coronial recommendations to tighten workplace health and safety regulation for theme parks, Ms Palaszczuk replied "absolutely".

"We never want to see anything like this happen again," she said.

"We need public confidence back in our tourist theme parks that things will operate the way they are supposed to operate."

Cindy Low, 42, and Kate Goodchild, 32, her brother Luke Dorsett, 35, and his partner Roozbeh Araghi, 38, were killed in the accident.

Ms Low's son and Ms Goodchild's daughter survived.

Counsellors have been sent to the Gold Coast site and Lifeline has set up a dedicated line for those affected.