The U.S. Open faced extreme heat on Wednesday, with temperatures exceeding 95°F (35°C), prompting officials to implement an extreme weather policy allowing players to take breaks during matches. Athletes like Frances Tiafoe and Alexander Zverev struggled with the conditions, with Tiafoe discarding multiple shirts and Zverev commenting on the flooded court from sweat. Some competitors, including Argentine Tomás Martín Etcheverry, experienced severe effects such as vomiting during matches. Players used ice towels and coolers designed to combat the heat, a necessity as the heat index approached dangerous levels. Despite the oppressive conditions, quick victories were achieved by players like Madison Keys and Zheng Qinwen, who adapted by finishing their matches swiftly. The event continued amidst the heat, showcasing the resilience of players and the challenges they faced under the sweltering sun.