The victim, who was only described as a 48-year-old man, was suspended approximately 30 feet above the ground and about six to eight feet below high-voltage wires, according to the Los Angeles Fire Department.
He was declared dead by paramedics on scene.
Video from AIR7 showed crew members and first responders attempting to recover the victim's body from the tree.
The power was shut off in the area by LADWP for the recovery operation.
No further details were immediately available.