Massive downpour causes flash flooding in Mandurah, more rain on the way

A massive downpour caused flash flooding in Perth and Mandurah on Sunday.

Several roads were under water in the Peel region after 20mm of rain fell in the space of an hour.

Cars had to be towed and some residents reported flooding in their homes.

This resident opened her front door to a pool of water. PIC: Leanne Waldock

According to the Bureau of Meteorology, 23mm of rain fell in Mandurah since 9am on Sunday.

Perth copped a drenching recording 44mm.

A severe weather warning is in place for parts of the South West including Albany, Walpole, Bunbury, Busselton, Dunsborough and Margaret River.

Showers and thunderstorms may cause damaging winds of up to 115km/h.

Conditions are set to ease on Monday afternoon.

The wet weather will continue for the rest of the week.