Hottest Places in the U.S.: Death Valley, Yuma, Phoenix, Vegas, Key West

• Death Valley, CA: World record 134°F (56.7°C); extreme desert.
• Yuma, AZ: Sonoran Desert; July avg high 105°F (41°C); sunniest US city.
• Phoenix, AZ: "Valley of the Sun"; July avg 104°F (40°C).
• Las Vegas, NV: Mojave Desert; July avg 103°F (39°C).
• Key West, FL: Southernmost continental US; tropical; July avg 87°F (31°C).

All are in arid or subtropical zones with intense summer heat.