Weather alerts have been issued for dangerous high tides and flood risks.

As the massive storm's set to bare down on parts of WA, the coastal town of Lancelin is tonight on high alert as huge swells threaten to breach its already eroded coastline.

A rare storm event has pummelled Western Australia's south, sending trampolines and sheds flying.

The entire South Australian coastline is under a severe weather warning with rain and damaging winds up to 100km/h on the way.

Residents in South Australia are being warned to expect rain and damaging wind today.

South Australia is one of four states set to be smashed by severe weather this week.

Damaging and destructive winds are set to smash large parts of South Australia after wild weather swept the state.

Lasting damage has been done by WA's once-in-a-generation storm, turning stretches of Perth beaches into cliff edges.

Weather alerts have been issued for dangerous high tides and flood risks.