Nation Relief in sight as extreme heat wave in West breaks more records. For Death Valley? Cooler temps mean 120-125. July 11, 2021July 12, 2021 Kate Mabus, USA TODAY Comments Off on Relief in sight as extreme heat wave in West breaks more records. For Death Valley? Cooler temps mean 120-125. One day after extreme heat smashed records across Western states, Sunday was expected to bring another round of all-time high temperatures.