The article discusses the extreme heat during the Australian Open tennis tournament. The temperature was extremely high, with some areas reaching over 45°C (113°F). This led to concerns about player safety and the overall conditions of the game. However, the players were able to adapt to the heat by using special equipment and strategies to stay cool. The article also mentions that the heat was so severe that it had an impact on the game's schedule, with some matches being delayed or postponed due to the extreme weather conditions.