The state is reeling from an emergency declared after more than two metres of rain fell on Monday night, leaving more than 200,00 homes without running water.
The heavy rain also left many homes without power and forced hundreds to be evacuated, the Queensland Emergency Services Authority said in a statement.
Water from a dam that feeds into the Brisbane River was diverted into nearby farms, but Queensland Water has since started delivering clean water to homes.
Water has been delivered to more than 1,600 homes, the statement said.
The Queensland Fire Service also confirmed it received a “significant number of calls” for help at 4.30pm (AEST) on Monday, with more than 3,000 calls received.
The number of people needing medical attention has also increased, the agency said.
People in areas where floodwaters are reaching levels above 20 metres, or where the dam has reached the maximum, should be advised to “take all necessary precautions”, the emergency services authority said.
Photo: Supplied “Due to the nature of the emergency, there is a risk of water supply to these areas becoming compromised and people being affected,” the emergency response authority said in the statement.
Queensland Fire and Rescue Service chief executive officer Mark Bunn said it was too early to determine whether the dam’s release had caused a flood surge.
“Our crews are working with emergency services to assess the water levels in the Brisbane Valley and we’ll be providing updates as the situation develops,” Mr Bunn told ABC Brisbane radio.
Queenslanders had been warned the water was “on the edge of a dangerous situation”.
Floodwaters have surged across Brisbane, Queensland’s biggest city, over the past two days.
“A flood is a big concern for residents,” Mr Hulme said.
“We have got some very vulnerable people who have got very little water, and we need to find ways to get them water as quickly as possible.”
The Queensland Government has promised to deliver clean drinking water to affected communities and the state’s rivers and streams will be kept open until the emergency has been lifted.
The government has also ordered a major review of Queensland’s water management.
Queensland Premier Annastacia Palaszczuk says a major overhaul of water management will be announced on Tuesday.
“As you can imagine, the amount of water that we’re dealing with is extraordinary,” Ms PalasZczuk told ABC Radio Brisbane.
“I think the Queensland Government is going to have a major rethink of the way we manage the water.”