South-east Queensland is expected to receive more rain over the coming days with the BoM warning of "life-threatening flash flooding" and potential landslides.
Locally intense pockets of rain are expected to bear down on already sodden and flooded catchments, with almost 20 flood warnings currently in place.
New emergency warnings have been issued in south-east Queensland as several communities battle major flooding.
An emergency alert has been issued for Gympie, already inundated by flooding with more "heavy to intense" rainfall on the way.
The Gympie Regional Council has issued a "watch and act" alert with residents urged to avoid driving where possible and to follow incoming warnings closely.
Another emergency alert has been issued for the Scenic Rim Regional Council this afternoon.
"Multiple roads are currently being impacted by flooding and road closures are in place," a QFES warning read.
"Residents in the SRRC area are urged to plan ahead and prepare for conditions. If travel is essential, adhere to signage and drive to conditions."
Major flooding is affecting the towns of Laidley, in the Lockyer Valley, Warrill Creek and Warwick south-west of Brisbane as well as communities along the Logan and Macintyre Rivers.
Warwick is completely cut off by floodwaters with the community braced for what could be the worst flooding in a decade.
The Condamine River is expected to peak at 8.2 metres between 6pm and 8pm tonight, higher than the 2011 floods.
Major flood warnings have also been issued for the upper Brisbane River and Stanley River with a minor flood warning for the lower Brisbane River.
The wet weather event pummelling Queensland's south-east will "linger longer" than anticipated, the Bureau of Meteorology (BoM) has warned.
"This is an evolving situation," a Bureau spokesperson said.
It was originally thought today would mark the "peak" of the weather system, which has caused chaos across Queensland's outback, far north and now the south.
Senior meteorologist Laura Boekel urged residents to keep up to date with BoM warnings as more heavy rainfall poses new risks for residents.
"These conditions, in combination with saturated catchments, will bring an increased risk of significant creek rises and dangerous and life-threatening flash-flooding with localised landslides also being possible," Boekel said.
Alerts are currently in effect across Gympie, Lockyer Valley, Warwick, Millmerran, Mount Tarampa, Minden, Patrick Estate, Stanthorpe, and the Scenic Rim.
The Bureau said broad areas of the state received over 100mm of rain.
State Premier Annastacia Palaszczuk said flooding is currently occurring in Gabbin and Laidley.
Around 300 homes in Laidley, in Lockyer Valley, south-west of Brisbane, flooded this morning when a nearby creek burst its banks.
It's one of dozens of catchments spilling banks. The waterways of main concern are: Condamine River, Logan River, Bremer River and Warrill Creek.
A moderate flood warning is also in place for the upper Brisbane river, while the lower reaches have a minor flood risk.
A list of all current flood warnings can be found here.
Emergency sirens also rung out at nearby Grantham to urge residents to high ground as the "unseasonable" upper coast low barrelled south.
Despite the threat, Palaszczuk said the intense rainfall the state is currently experiencing is not as heavy as the previous flooding event in February, which caused multiple deaths and the destruction of homes.
"This rainfall is actually more sporadic, and not as heavy," Palaszczuk said.
"But we are still seeing some cases of flooding, and the river rising in particular areas.
"We are asking people where possible, if you don't need to be out on the roads, please don't travel unless you absolutely must."
Queensland Fire and Emergency Services Minister Mark Ryan said despite it being an unusual time of year for a flooding event, emergency services remain prepared.
The rain has also forced the closure of many schools across the state and hazardous surf is pounding a large swathe of coastline from Fraser Coast down to the Gold Coast.
Town swallowed before people's eyes
Nine swiftwater rescues were conducted from 3pm yesterday into this morning and the SES has received 150 calls for assistance.
Multiple rescues unfolded in Laidley as residents became trapped inside homes in the town's south as waters rose rapidly.
Earlier this morning Laidley Creek broke its banks at Mulgowie and it's now threatening lives homes and businesses.
The town will be one of the hardest hit communities today, Senior Bureau forecaster Christie Johnson said.
There are eight evacuation centres opening there.
Locals spoke of their frustration to 9News reporter Jess Millward.
"I feel sad for the town. The town can't take it. The businesses, the people. It's sad. Still getting over the last one," one resident said.
"I feel sad for the town. The town can't take it. The businesses, the people. It's sad. Still getting over the last one," one resident said.
Another said she was shocked at how fast the waters rose.
"Last night when I was looking at the cameras, it wasn't that high, she said.
"This is my first flood in Laidley so it is a little bit scary but I feel for the townspeople, the business owners and that."
The Grantham Siren was activated earlier this morning "to give residents time to move to higher ground" as saturated catchments spill over.
A number of schools are also closing across the state due to flooding. Up to date information can be accessed here.
The council have asked people in low-lying areas across the Lockyer Valley to leave this morning, ahead of official evacuation orders.
"In response to the most recent weather forecast, all residents in low-lying areas subject to flooding are being urged to self-evacuate," the local council said, adding waters are rising rapidly.
Heavy downpours will continue today, with forecasts predicting up to 200 mm across the Capricornia to the NSW border.
9News understands SES personnel are also door-knocking in Grantham to urge residents to move on.
Firefighters share photos of inferno threatening homes
'Terrifying': Emergency sirens ring out across Grantham
An emergency siren also rang out across the town, which resident Linda Godley branded "terrifying".
"We didn't have any sirens yesterday or the day before, so this is the first time we've had the sirens," she told Today.
"We don't know what's going to happen. You know we can't do this again.
"It's destroying our whole family. It's destroying everything, you know, you can't think, you can't sleep, we're so tired but you are to scared to sleep."
Colleges Crossing in Ipswich has also gone under, the second time it's been swallowed by floodwaters since February.
Earlier this morning Millward observed "water creeping up through the drains" in the CBD.
Images from Transport and Main Roads Queensland also show extensive flooding around Somerset Regional Council.
A hazardous surf warning is currently in place from the Fraser Coast down to the Gold Coast with the Bureau warning swells of more than three metres.
