A private helicopter pilot has rescued 15 people caught in flood waters in Western Australia's Great Southern region, as heavy rain drenches much of the state.
Torrential rain has swollen rivers and washed away roads across WA, with the state's Wheatbelt and Goldfields hardest hit.
Flood warnings are in place for the lower west, south coastal and southwest district, including the Avon, Fitzroy and Swan Rivers.
Flood water enveloped the Phillip River Bridge on the South Coastal Highway near Ravensthorpe on Saturday afternoon, leaving 15 people from six vehicles stranded.
WA's Fire and Emergency Services confirmed they had contracted a private pilot of a small helicopter to rescue a group.
"It's going to be a while because they can only take two to three passengers at a time in the helicopter, so it's probably going to take a number of hours," a DFES spokeswoman told AAP.
A helicopter was also used to airlift a pregnant Ravensthorpe woman to the larger regional centre of Esperance.
While helicopters were the rescue vehicle of choice in the Great Southern, Northam locals decided to use jetski.
A family of three and their dogs were plucked from floodwaters by a jetski on Friday evening according to DFES.
Two more people and a dog were rescued from floodwaters in Nalyerlup, north of the Stirling Range National Park on Saturday.
Water levels within the Avon River catchment are expected rise over the weekend with up to 70mm of rain recorded in the 24 hours to Friday night, the Bureau of Meteorology says.
Several major roads and highways are closed throughout the flood affected areas, including the South Coastal Highway, Goldfields Highway and the Great Eastern Highway.
Flooding hit the community of Toodyay, along Stirling Terrace, and Mortlock River East at O'Driscolls Farm on Saturday morning.
Moderate flooding was also expected along the river in Beverley, with water under the town's bridge at 1.75m and rising during the day.
Meanwhile the Swan River in Perth is expected to peak at 1.6 metres early on Sunday as the runoff from Wheatbelt rainfall reaches the city.
Perth received its second highest rainfall on record on Friday, with more than 114mm raining down on the city.
