UPDATE JULY 24: 13 Action News spoke with a neighbor who helped save one of the children from the fire.
Moises Diago says he saw the two kids inside the house.
"The boy here," he said, "and the girl is on the other side."
He says he was quickly able to rescue the boy.
"Come on ..." he said, "let's go with me!"
That's when the little girl ran away and locked the door.
Her mom tells 13 Action News she didn't recognize the neighbor and has been taught to stay away from strangers.
Firefighters found the child unresponsive. Relatives say she's been able to make a miraculous recovery.
"She's a brave little girl and she pulled it through," said grandfather Bill Marion.
UPDATE JULY 22: Neighbors captured video of the terrifying moments after an explosion caused a family's garage to catch fire.
Flames engulfed the garage after a large boom was heard from people inside the home.
Davelys Diago tells 13 Action News her father tried to run into his neighbor's home after they heard the explosion across the street.
"He went in there, he grabbed the son, he tried to grab the daughter but she ran away because she was scared," Diago said.
Eventually, firefighters rescued the girl and the family's dog. Diago said her family is caring for the dog as the family remains in the hospital.
LAS VEGAS (KTNV) -- Firefighters rescued a little girl from a burning home near Sahara Avenue and Grand Canyon Drive on Friday.
Las Vegas and Clark County firefighters were called to the scene around 9:18 p.m. after the garage caught fire. Firefighters were told on arrival that a little girl and possibly an adult were in the house. Crews inside were met with thick, black smoke as they ascended the stairs to the second floor.
The little girl was found lying on the floor in a room near the garage. She was unresponsive. Firefighters were able to get her out of the house, and she began to respond to treatment performed by paramedics on her way to the hospital. She is currently in critical but stable condition.
Although the entire downstairs sustained extreme heat and flame damage, the room where the little girl was found had minimal damage because the door was closed. That kept the majority of the heat, flames, and smoke from entering the room.
The father told fire investigators that he was home with the little girl when he heard a loud boom in the garage. Black smoke began to enter the home through the vents. He said he could hear the girl crying, but could not find her.
Firefighters say the father tried entering the smoke-filled home twice to find the girl. Once crews arrived at the scene, they kept him from re-entering the house.
The cause of the fire is under investigation. So far, officials believe it started near a work bench in the garage. Damage was estimated at $100,000.