It has gotten so hot, Australian meteorologists had to add a new color to their temperature maps.
While the first three days of the Open weren't unbearably hot, the last two days saw temperatures hover between 100 and 105 degrees while day-time matches were going on.
The heat produced some truly incredible photos. We collected our favorites.
They involve players sweating, fans seeking shelter in fountains, and more mesmerizing contrasts between shade and sun.