Family and friends were originally unable to access the area as crews battled a 50-acre brush fire that continued to burn Wednesday.
Morelos issued a desperate plea to her brother, as well as to those who may have seen him since his disappearance.
"If he's out there, if he's scared, we just want to let him know we're all waiting for him. If anybody has seen him – I mean, we're hoping he's scared to come home. We just want him home," said Morelos, who is a former KTLA employee.
Huerta's phone is still ringing, and texts appear to be going through to his phone, leading Morelos to believe he may have left the device in his vehicle.
"There's indication, according to my father, that sheriffs saw someone exiting a white car matching his 2012 Nissan Sentra," she said, referring to surveillance video. "But they didn't see that person walk back."
Authorities are aware that he is missing, and are searching the area, including in abandoned buildings, Morelos added.
She described her brother, the youngest of six siblings, as a "normal, happy kid," who played soccer and had just started college at Cal State Northridge University.
