WA has sweltered through another day of extreme summer heat, with the mercury rising to more than 40 degrees Celcius in some areas.
Lingering clouds did little to stem rising temperatures in the city today which peaked at 39.3C at 12.28pm. Mandurah residents saw the temperature reach 38.4C at 12.51pm and those in Swanbourne saw the temperature reach 37.5C at 10.18am.
People on Rottnest Island were granted some relief from the heat with the mercury reaching 31.5C at 12.48pm.
The State's hottest temperatures of the day were in the Pilbara where Telfer recorded the State's highest temperature of 42.4C at 2.31pm. Marble Bar residents sweated through 40.7C at 11.26am and at Roebourne Airport the temperature reached 38.5C at 10.59am.
The temperature also rose above 40C at Cunderdin Airport in the central Wheatbelt and in the Kimberley at Curtin, Mandora and Fitzroy Crossing.
The Great Southern's hottest temperature was recorded at Wandering where it reached 39.5C at 2.52pm and in the South West Bridgetown recorded the highest temperature in the area with 38.8C at 2.22pm.
Meanwhile, the Bureau of Meteorology has warned of a cyclone located off the coast WA's north this afternoon.
The tropical low was located 790km northwest of Karratha and 750km north-northwest of Exmouth. It is not expected to affect mainland WA in the next 48 hours. The Bureau says the cyclone is moving south at 13km/h.
With temperatures set to hit a maximum of 41C in Perth on Saturday and Sunday, beaches and swimming pools are becoming hotspots for residents and tourists. However, those trying to cool off at the Peel-Harvey Estuary have been asked to avoid contact with dolphins in the waterway.
The Department of Environment and Conservation said an eight-year-old dolphin had been seen struggling in the area with a noticeable birth defect.
Senior marine operations officer John Edwards said a vet was being organised to assess it due to reports of its deteriorating condition.
"Dolphins can sometimes become stranded in areas of low water and can get badly sunburnt so we ask that people keep on the lookout and alert authorities if they see a distressed or stranded animal." he said.