A man suffered burns to much of his body after falling into a hot spring near Old Faithful on Sunday at Yellowstone National Park.
Cade Edmond Siemers, 48, managed to get out and back to his hotel room, where he called for help, according to an announcement from the park. Rangers and paramedics responded to the Old Faithful Inn at midnight.
Siemers told rangers he had gone for a walk off a boardwalk without a flashlight and tripped into a hot spring.
He was taken by ambulance to West Yellowstone Airport and then flown to Idaho Falls, where he was admitted to the burn unit at Eastern Idaho Regional Medical Center.
On Monday morning, rangers searched the thermal area and found several items near the geyser, including a man's shoe, a hat and a beer can. They also found footprints going to and from the geyser and blood on the boardwalk.
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Rangers suspect alcohol use contributed to the incident.
Park officials are still investigating the matter and assessing whether the geyser cone was damaged.
In 2016, an Oregon man died after falling into a hot spring at Norris Geyser Basin. That same year, a 13-year-old boy fell into a hot pool in Upper Geyser Basin.