Mount Everest's deadliest avalanche ever, which killed at least 12 people early Friday, raises questions about whether Discovery Channel's "Everest Jump Live" special, set to air May 11, will go on as planned.
The avalanche struck and killed 12 sherpas, who guide climbers to the summit, leaving four missing.
NBC News had a crew of seven in place at a Mount Everest base camp, including Jonathan Fierro, a producer with NBC's Peacock Productions and cameraman Ed Wardle.
The two were working on the live two-hour event in which climber Joby Ogwyn was set to leap off the top of Mt. Everest.
The program is being produced by Peacock Productions and hosted by Kyle Martino of NBC Sports and Chris Jacobs.
"The avalanche last night on Mount Everest is a terrible tragedy, and our thoughts and prayers are with those who are lost and with their families. The immediate priority for Joby and the team is to assist the search and rescue efforts in any way possible," Discovery Channel said in a statement.
"It's a pretty regular occurrence here, nobody was shocked by that," Wardle told Savannah Guthrie on "Today." "When radio reports started coming off the mountain that people were stuck in the avalanche, everybody came out and started getting organized for the rescue."
"To lose this number of people at the very beginning of the season may be the end of the season here," he added.
Discovery Channel has scheduled to broadcast five nights of live programs from Everest Base Camp beginning at 11 p.m. ET/PT on May 5.
Deadly Everest Avalanche Raises Uncertainty for Discovery's 'Everest Jump Live'
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