Sophia Bush’s boyfriend, Google programmer Dan Fredinburg, was on Mount Everest when the avalanche occurred to make April 18, 2014 the deadliest day on the mountain.

Sophia Bush's Boyfriend Missed Everest Avalanche

Fredinburg had passed the location of the avalanche, which killed 16 people, just hours before it wreaked havoc, taking experienced Sherpas by surprise.

"The climbing team is OK," Bush told E! News about Fredinburg’s party. "It was obviously really scary for all of us who love him and love everyone on the trip. They had just passed the icefalls where the avalanche happened a few hours before."

"It's a tight community—the climbers and the Sherpas," she added. "To know that so many people were lost is devastating to everyone. How do you quantify or qualify that?"

On the date of the avalanche, the Chicago P.D. star took to Twitter to inform her followers that Fredinburg was safe and sound.