After temperatures soared on Friday at the German Grand Prix, the weekend arrives will significant changes in the climactic conditions.
A similar period of high temperatures hit the continent around the Austrian GP last month, exposing cooling deficiencies in the Mercedes and condemning the Silver Arrows to their sole winless race of 2019 so far.
The mercury jumped in Hockenheim earlier this week, with temperatures almost reaching 40 degrees Clesius on Friday.
However, Saturday brought cooling storms, with the order shaken up even further by Ferrari's mechanical issues.
With Lewis Hamilton and Max Verstappen on the front row, it looks like a battle to master wet conditions is on the cards.