Summer's wild weather is set to continue this week, with heatwave conditions hitting parts of Australia.
Inland WA is expected to climb to 45 degrees Celsius on Tuesday before south-eastern Australia experiences "extreme" heatwave conditions at the end of the week.
"Scorching temperatures expected across large parts of Western Australia today as a broad trough drags a very hot air mass south," the Bureau of Meteorology (BOM) tweeted.
"Most inland towns expected to reach at least 40°C."
BOM then forecasts the heat to move across the country in the coming days.
Adelaide will warm up mid-week, reaching 38 degrees on Wednesday and 42 degrees on Thursday.
Melbourne is set for a hot end to the week, with the mercury hitting 37 degrees on Thursday and 41 degrees on Friday.
Canberra is forecast for 41 degrees on both Friday and Saturday, while parts of western Sydney's will hit 44 degrees on Saturday.
According to BOM, a heatwave is "three or more days of high maximum and minimum temperatures that are unusual for that location".
Melbourne will heat up at the end of the week. Source: Getty
"Extreme" heatwaves, which some parts of the country will experience this week, "will impact normally reliable infrastructure, such as power and transport".
"Extreme heatwaves are a risk for anyone who does not take precautions to keep cool, even those who are healthy," BOM material says.
Material from Healthdirect Australia, a national public health information service, says "heatwaves have killed more Australians than all other natural hazards combined".
Its heatwave tips include: drink plenty of water, keep your body cool, keep your house cool and take care of others, especially children and the elderly.
The looming heat could also mean a rise in bushfire danger, with a number of states and territories already ordering total fire bans.
