The Bureau of Meteorology has issued a severe weather warning across Lower West, South West and parts of Central West and South Coastal districts.
The warning, issued at 4:11am this morning, reports a rain band and cold front will bring the potential for heavy rainfall, damaging winds and abnormally high tides.
Affected areas include Busselton, Bunbury, Collie, Geraldton, Mandurah, Manjimup, Margaret River, Moora and Perth.
“HEAVY RAINFALL that may lead to FLASH FLOODING will develop southwest of a line from Bunbury to Walpole during Monday morning as the rain band moves through.
"HEAVY RAINFALL should then extend as far north as the Perth area after around midday Monday, and through the remainder of the warning area by 5pm Monday. Rain should start to ease over southern parts of the warning area late Monday afternoon or early evening."
"DAMAGING WINDS to 110 kilometres per hour which could result in DAMAGE TO HOMES AND PROPERTY are possible southwest of a line from Bunbury to Walpole until late Monday afternoon, most likely in exposed coastal areas.
"Tides between Shark Bay and Cape Leeuwin are likely to rise above the normal high tide mark with very rough seas and potential flooding of low-lying coastal areas around the time of high tide until Monday afternoon, particularly within Geographe Bay."
Although conditions should ease in the afternoon, the bureau predicts a second wave will hit us again on Tuesday morning.
Find out more, including tips on how to stay safe here.