Furnace Creek and Stovepipe Wells are among the roadside outposts inside Death Valley National Park, while Dante’s View draws tourists at sunset and Hell’s Gate greets visitors arriving from the east. In the summer, it is so hot here, along California’s southeastern spine, that some of the roughly 800 residents — nearly all of them park employees — bake brownies in their cars. A large, unofficial thermometer in recent years has ticked up to 130 degrees, making it a destination for travelers, and the park has endured some of the highest temperatures ever recorded on Earth.