Western Australia's west is currently enduring one of its worst heatwaves in years, with records likely to tumble in some areas. A stagnant low pressure trough lying over the state's west coast is allowing hot interior air to pool over the region, causing very hot conditions for days on end. Perth is experiencing its hottest week in three years, averaging more than 38 degrees, and is a good chance to equal its record of four consecutive 40-degree days set way back in 1933. Further north the heatwave is even more intense, with Carnarvon on track to see 11 straight days of 37 degree heat, unprecedented since records began in 1945. Marble Bar is forecast to reach 48 degrees on Thursday (amongst a three day spell of 47 degree heat), about the hottest it has been since the station opened in 2001. For southern residents at least, some relief will come from Friday as a weak cold front clips the region. However, it will continue to remain very hot in the north. Looking further ahead, there is a chance another trough will drag the heat back into the south early-to-mid next week, although it is unlikely to be as long lasting as before.