South Australia could be on its way to another weather record this week and this time it's Adelaide's hottest day ever.
The Bureau's revised Thursday's top to a scorching 44C.
The previous maximum was recorded in January of 1939 at 46.1C.
Today, the mercury will climb to 37 in the City but climb to 46 in the North-East at Marree and Oodnadatta.
The SES has issued an Extreme Heat warning, particularly for babies and young children, the elderly, pregnant women and those who are already unwell.
While generally healthy people are still at risk when it's hot during the day and doesn't cool down at night.
We're being encouraged to take action and make sure our families are staying well during the event.
Some tips on staying cool during a heatwave -
Stay indoors but if you must go outside, try to do so in the early morning or in the evening
Drink plenty of water
If you're taking any prescribed medicines, consider checking with your Doctor for any additional advice
Check to make sure your pets and animals have shade and water
Swimming is a great way to keep cool but never leave children alone near water and swim between the flags at the beach
Keep your mobile phone charged
Make sure you have ice in the freezer, a torch and a battery powered radio in case of emergencies
Tomorrow we can expect a warm 39C.
If you or anyone you know needs immediate medical attention, call 000