Furnace Creek

Death Valley may have recorded Earth's highest temperature in 90 years. Data show it is also be among the top three highest temperatures ever measured in Death Valley.

The "business-as-usual warming of the planet" could make areas too warm for human habitation if heat trends continue, climate researchers say.

You won't need any reminder that it's summer in the national park. The heat wave that's settled over the Southwest has already brought 120-degree readings, which will likely be surpassed this week.