Emergency crews in California’s Sierra Nevada mountains carried out controlled blasts on Friday to stabilise snow conditions and assist recovery efforts after a fatal avalanche near Castle Peak outside Lake Tahoe.
Eight people were killed earlier this week when a large avalanche, roughly the size of a football field, struck a backcountry skiing group. One person remains missing.
Recovery operations have been delayed since Tuesday due to severe weather and unstable snow conditions. Authorities are also investigating whether criminal negligence contributed to the tragedy, examining why the skiing expedition continued despite storm warnings.
Probes are being conducted by the Nevada County Sheriff's Office and a state workplace safety agency to determine responsibility and safety compliance.
Among the victims, six were experienced backcountry skiers and close friends, while three were professional mountain guides associated with Blackbird Mountain Guides. The company’s founder stated that the guides were certified and trained for such expeditions.
The avalanche is reported to be the deadliest in the United States since 1981, highlighting ongoing risks associated with backcountry winter sports.
Officials continue search and recovery operations while monitoring mountain stability.