Wild weather is hampering urgent efforts to find a man in his 60s reported missing in bushland in Queensland's southeast.
The 65-year-old is one of three men who remain missing across Queensland in the wake of Cyclone Debbie and the ensuing floods.
He was last seen in the Lamington National Park area on March 29.
Police believe he was walking with a large sightseeing group but didn't return to a pre-arranged meeting point.
"It's been rough terrain to cover due to the weather conditions, we had mud and other debris to clear before we were able to access the area," Senior Sergeant Glenn Ryder said.
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"The weather is also impeding our ability for an aerial search but we hope to get the helicopters up shortly."
The other two missing men are 50-year-old Mondure man David Heidemann and 58-year-old John Frost from Mount Pleasant in Mackay.
Queensland State Disaster Coordinator Steve Gollschewski said "exhaustive" searches were being undertaken and there were serious concerns for the trio's welfare.
So far, there has been one confirmed Queensland death following the flooding driven by heavy rain after category four Cyclone Debbie swept down the state last week.
The body of 77-year-old Nelson Raebel was found in floodwaters at Eagleby in Logan on Saturday.
A further four flood-related deaths have been recorded in northern NSW.
