DEATH VALLEY NATIONAL PARK, California:As uninviting as it sounds, Death Valley National Park beckons. Even as the already extreme temperatures are forecast to climb even higher, potentially topping records amid a major U.S. heat wave, tourists are arriving at this infamous desert landscape on the California-Nevada border.
Daniel Jusehus snapped a photo earlier this week of a famed thermometer outside the aptly named Furnace Creek Visitor Center after challenging himself to a run in the sweltering heat. "I was really noticing, you know, I didn't feel so hot, but my body was working really hard to cool myself," said Jusehus, an active runner who was visiting from Germany. His photo showed the thermometer reading at 120 degrees Fahrenheit (48.8 degrees Celsius).
Most visitors at this time of year make it only a short distance to any site in the park — which bills itself as the lowest, hottest and driest place on Earth — before returning to the sanctuary of an air-conditioned vehicle.
This weekend, the temperatures could climb past 130 F (54.4 C), but that likely won't deter some willing to brave the heat. Signs at hiking trails advise against venturing out after 10 a.m., though nighttime temperatures are still expected to be over 90 F (32.2 C). The hottest temperature recorded at Death Valley was 134 F (56.6 C) in July 1913, according to the park service.
Other parks have long-standing warnings for hikers. At Grand Canyon National Park in Arizona, officials are cautioning people to stay off the trails for most of the day in the inner canyon, where temperatures can be 20 degrees hotter than the rim.
In west Texas, Big Bend National Park near the Rio Grande is expected to be at least 110 F (43.3 C). The National Weather Service has said it's best to just stay off the trails in the afternoon.
The precautions vary across parks and landscapes, said Cynthia Hernandez, a National Park Service spokesperson. Certain trails might be closed if conditions are too dangerous. Alerts and restrictions are posted on websites for individual parks, Hernandez said.
Preliminary information form the park service shows at least four people have died this year from heat-related causes across the 424 national park sites. That includes a 65-year-old man from San Diego who was found dead in his vehicle at Death Valley earlier this month, according to a news release.
Death Valley National Park emphasizes self-reliance over expectations of rescue. While rangers patrol park roads and can assist motorists in distress, there's no guarantee lost tourists will get aid in time.
More than 1.1 million people annually visit the desert park, which sits over a portion of the California-Nevada border west of Las Vegas. At 5,346 square miles (13,848 square kilometers), it's the largest national park in the Lower 48. About one-fifth of the visitors come in June, July and August.