GOOD soaking rain has drenched Redlands, Beaudesert and Logan overnight and early this morning, and there is more to come.
Rainfall totals of 30mm to 60mm have been reported through the greater Brisbane region over the past two hours.
The Bureau of Meteorology warned storms were impacting a large area with slippery driving conditions, flash flooding, and fallen power lines and trees affecting areas.
Rain lashed the Redlands, with almost 49mm falling at the Alexandra Hills weather station in the past 24 hours.
Logan received 51mm, and Greenbank 37mm.
Beaudesert recorded 21mm during the same period. So far this month, 93.6mm of rain has fallen in the town, busting its 70mm October average.
Canungra reported 24mm of rain with nearly 78mm in the past two weeks.
It came just hours after the weather bureau released a severe thunderstorms warning.
Paramedic Jen Kinsela urged motorists to slow down and drive to conditions, with wet weather to continue across the region.
"This morning we've seen quite a few road traffic crashes which were contributing to the wet weather," she said.
Ms Kinsela said so far medics had only seen minor prangs and a few rollovers.
"With the flash flooding predicted, particularly later this afternoon, we're encouraging all drivers to drive with their lights on, to try and slow down and drive to the conditions and just be extremely cautious when they're out on the wet roads," she said.
The wet weather follows the seasonal severe weather outlook which warns of an increased chance of widespread flooding and the possibility of an average, or slightly above average, number of tropical cyclones this summer.
The outlook, released in October annually, also outlines the risk of severe thunderstorms, heatwaves and bushfires.
Weather bureau senior climatologist Greg Browning said Australia was entering the peak severe weather season.
"Many climate drivers are indicating that it could be an active season across parts of Australia," he said.
"The current La Nina watch, warm waters to the north of the continent and the sea surface temperature pattern across the Indian Ocean points towards more rainfall for much of Queensland.
"It is also likely that the first rains of the northern wet season will arrive earlier than normal for many locations."