An emergency alert issued by the Lockyer Valley Regional Council at 3.30am urged people to move to higher ground if it was safe to do so. Lockyer Valley Mayor Tanya Milligan this morning confirmed that flood sirens had been sounded at Grantham and that police had doorknocked in the area. She told the ABC that shelters were open and that swiftwater rescue teams were on standby, but had so far not been called out.She said that it was possible about 260 homes could be inundated across the region, including in the Laidley CBD. The Lockyer Valley alert was one of a series of emergency alerts issued overnight – with residents in Warwick, Allora and parts of the Scenic Rim also warned of weather dangers. Dozens of flood warnings also remain current across the state. The main street of Killarney, in the Southern Downs region, was inundated by floodwaters on Thursday night, several hours after an initial flood warning was issued for the area.Images posted to social media late on Thursday show floodwaters rising on what is believed to be Ivy St, inundating businesses and swamping roads.The Condamine River was approaching the 6m major flood level late on Thursday night, recording a height of 5.80m and rising at 11pm.Brisbane rain radarA severe weather warning is now in place for areas from Capricornia to the southeast corner and inland. An upper low that is creating the rain is expected to move south during Friday, with six-hour falls of up to 160mm possible. Life-threatening flash flooding is possible. Areas that may be affected include Brisbane, Ipswich, Toowoomba, Maroochydore, Gympie, Hervey Bay, Maryborough, Bundaberg, Gladstone, Kingaroy, Caboolture and Gatton.The Bureau says that overnight, rainfall of 132mm fell in six hours was recorded near Agnes Water, 119mm at Wonbah inland from Gin Gin and 117mm at Spring Creek Road, in the Southern Downs. The Bureau issued a minor flood warning for Brisbane City on Thursday afternoon, with people in the Sunshine Coast and Noosa told to prepare for intense rainfall and potentially dangerous flooding throughout Friday.Roads around the South East are closed. A 36-year-old man and his dog were found well on Thursday after they went missing from a campsite at Imbil, which was isolated due to flooded river crossings. Meanwhile, a group of farmers rescued a man who was stranded and clinging to a tree in floodwaters in the Bundaberg region. Emergency services were also called West Ipswich to assist two people after they became trapped in floodwaters, but they were saved by passers-by when one of the occupants climbed on to the roof of their car to attract attention.An initial flood watch was issued for the Wide Bay and Burnett, Southeast Queensland, Darling Downs and Granite Belt areas, but meteorologist Brooke Pagel said the weather system was unlikely to bring a repeat of the widespread and destructive floods of February. The BOM’s Ms Pagel said the risk of major flooding along the lower Brisbane River was significantly less than in late February because the fast-moving weather system was expected to ease by Saturday.“The rain and the catchments that are really in focus at the moment … is actually out at Lockyer Valley around Gatton and Laidley Creek,” she said. “But for Brisbane itself and even outer Brisbane, regions like The Gap and Moggill, it doesn’t look like there will be any major flooding for those catchments.” Lockyer Valley Regional Council urged households at risk of being cut off to have at least three days’ worth of vital supplies on hand, avoiding the need to call for essentials. Mayor Tanya Milligan said it was a blessing that she was yet to receive reports of homes flooding on Thursday afternoon, and hadn’t received any requests to open the evacuation centre. “While I say there’s no inundation in homes, there is certainly water in people’s yards,” she said. In Rockhampton, a multimillion-dollar super yacht that smashed into the Capricorn Coast on Wednesday afternoon began sinking after its anchor lost hold during the rough conditions.It was believed the yacht was available to be rented through online platform Airbnb for about $14,000 a week for 12 guests, with its owners based on the Gold Coast.Brisbane’s May rainfall totalled more than 110mm by Thursday afternoon, with up to 60mm forecast for Friday and 15mm on Saturday. It’s been seven years since May rainfall in Brisbane reached that total. Ms Pagel said it was the wettest May for Queensland in five to eight years. Brisbane has so far received more than 1.3m of rain this year, the Gold Coast 1.2m and the Sunshine Coast 1.38m.While May records have been broken, this week’s severe weather brought significantly less rain than the stubborn trough, which flooded homes across the southeast earlier this year. The river city recorded 887mm for February, while 699mm fell on the Sunshine Coast and 409mm on the Gold Coast. Queensland satellite (rainfall)Ms Pagel said the slow-moving troughs that dumped huge totals across Queensland earlier this year behaved differently to this weather system. “One was an embedded tropical low, another was a stagnant trough that hovered over the area for days, which caused all that (Brisbane) River flooding, and the Maryborough one was stagnant and it bucketed down for days over one area,” she said.“With this one, all the rain we received on Thursday is what Mackay and Cairns received on Wednesday, which indicates it is quite fast-moving. By Saturday, it’s only suggesting 15mm, which indicates this will move offshore quite quickly.”Up to 60mm of rain is expected for Brisbane on Friday, 80mm for Gatton, 45mm for the Gold Coast, 90mm for Maleny and 100mm for Bundaberg. Ms Pagel said a prolonged La Nina meant Queensland experienced a late wet season. The BOM on Thursday released its Climate Model Summary, which revealed La Nina was persisting, but should return to neutral-ENSO by July.