Boats have sunk, yachts have been beached and hundreds of resident are carrying on their day without power as two weather systems collide.
Two boats have been affected by high tides in Dawesville, both secured against moorings but unfortunately have sunk. 
In Rockingham two yachts have washed ashore at Palm Beach with locals now trying to secure them to trees.
The Bureau of Meteorology said tides between Kalbarri and Walpole are likely to rise above the normal high tide mark with very rough seas and potential flooding of low-lying coastal areas.
Mandurah State Emergency Service said it was called out to five storm related incidents, helping to quickly repair damage before another wave of bad weather hits the city today.
A spokesperson from Mandurah Volunteer Marine Rescue said conditions were too rough to attend call outs for the sunken vessels.
Western Power said 40,000 customers have been left without power following storms this morning, with around hundreds of residents in Dawesville, North Dandalup and Jarrahdale left in the dark.
40,000 customers from Kalbarri to Albany are without power following this morning's storm. Crews are working to remove hazards and make it safe, before starting repairs. More bad weather is forecast for later today, which may slow down restoration efforts #perthnews #wanews pic.twitter.com/8hWl4PuOK8
— Western Power (@westernpowerwa) June 5, 2018
A strong and squally northerly flow ahead of a strong cold front will extend throughout the warning area during the morning.
Damaging Winds with gusts to 100 km/hr are possible through most western parts of the warning area, including Mandurah.
Winds will ease over western coastal parts during Tuesday afternoon.
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