A motorcyclist died of suspected heat exposure, and another was hospitalized for severe heat illness amid record temperatures at Death Valley National Park, California, on Saturday.

The deceased motorcyclist’s identity and the hospitalized patient’s condition were not disclosed.

The Inyo County Coroner’s Office has not provided further information. Four other riders in the group were treated for heat stress at the scene, according to National Park Service Ranger Nichole L. Andler.

The group was riding near Badwater Basin, the lowest point in North America, NBC News has reported.

The National Weather Service recorded a high of 128 degrees at the nearby Furnace Creek Visitor’s Center, surpassing the previous record for July 6 set in 2007.

Written by B.C. Begley