 Even Reno, the second largest city in the northern part of the state, hit a high of 104 Saturday. Death Valley, right at the Nevada-California border, reached 128 degrees, breaking its previous record of 127 set in 2007. And there's little relief at night as lows don't cool down below 90 degrees. After Wednesday, the heat dome is expected to move east. Temperatures in southern Nevada should cool down around 110.