Here we go with the second peak of the heatwave as it pushes in a south easterly direction across the continent

45C forecast for Adelaide today - Adelaide is the capital city of South Australia

49 forecast for Port Augusta - that's incredible for a southern coastal city

43 forecast for Melbourne tomorrow (where the Australia tennis grand slam is being held), and 45 for most inland areas and winds up to 50 kph.

Cool change is expected to follow late in the day with 15C drop in 15 minutes - which will be ... cool