Total fire bans are in place for a large portion of the state today due to extreme heat.
This includes the City's of Mandurah, Rockingham and Kwinana and the Shire's of Murray and Serpentine-Jarrahdale.
Open fires, metal work, grinding and welding along with off-road activity such as four-wheel-driving is prohibited.
It comes as a number of WA towns broke heat records on Sunday with Carnarvon and Shark Bay reaching almost 50 degrees.
Perth is set to hit 43C on Monday, while 39C is forecast for Mandurah and Rockingham.