After spiking to 41 in the city today, temps will stay as high tomorrow before a cool change comes in on Sunday.
Conditions will be even worse in regional areas where the mercury will reach 46.
BOM SA advises that: The SES has issued an Extreme Heat Warning for South Australia. Very hot and sunny. Winds east to northeasterly 15 to 25 km/h tending north to northeasterly 20 to 30 km/h early in the morning then becoming light in the evening.