Airservices Australia is warning passengers due to land in Perth to expect turbulence.
The State Emergency Service say they have responded to more than 329 calls for help, the majority coming from residents along the Perth coast.
They include several car crashes and drivers stranded on waterlogged roads, but so far no severe damage has been reported.
Main Roads has advised motorists to check road closure updates and take extra care on the slippery roads.
A severe weather warning has been issued for residents in the Lower West, South West and Great Southern regions, stretching from the city of Bunbury to Albany, and extending from the Margaret River coast inland to Mount Barker, Katanning and Narrogin.
Widespread rainfall between 50 to 80mm is expected, with isolated falls of 120mm possible. A flood warning is in place for the Lower West.
The rain came just after a bushfire north of Perth sent smoke over the city.
- AAP
