We're in for a massive spike in temperature today.
The mercury's set to soar to 39 degrees in the City and up to 43 further out.
Fire danger has been listed as severe for 9 districts including the Mount Lofty Ranges.
We're being urged to stay hydrated and look-in on neighbours or the elderly.
While it could impact fans planning to line Adelaide streets from Unley to Lyndoch for Stage One of the Santos Tour Down Under today.
Riders will wind through Mawson Lakes, One Tree Hill and Kersbrook before looping the Barossa at Williamstown.
They'll sign on at 9.30am so be at King William Road to catch a glimpse of your favourites before they take off at 10.30am.