CLEAN : Huge storm hits US West Coast Ventura County hit by rockslide

The transcript describes a sudden rockfall that impacted a house, despite prior preparations with concrete blocks and sandbags. The residents were caught off guard by the severity of the event, which occurred while they were asleep, and they were too far away to hear the rocks crumbling down.

Describe the emotional impact of the event on the residents.

What did the residents fail to hear during the event?