In the middle of a blocked road, Francisco Ortiz sits on one of the many upturned buckets that rescue workers have been using to move rubble.
In front of him is what was once a four-storey apartment building.
It's now a one-storey pile of rubble.
His sister, Maria Ortiz, a cleaner who worked in the building, was last seen running down the stairs when it collapsed.
That was four days ago.
"I am committed to this, I am not going to move, I am not going to leave," he says.
The day after the quake this building was cordoned off.
Authorities were not letting anyone — including rescue workers — near it.
Too risky, they said. They said they were worried the building next door was going to collapse too.
Francisco says it was only yesterday the search and rescue team went in.
"They thought there were no people there so they wanted to bring in machines and remove the rubble without knowing there are human beings inside — my sister is inside there," he says.
I ask him if he thinks she is still alive.
"They say that faith can move mountains," he says.
"I have faith that my sister is OK."
Sitting on another bucket is Pablo De La Mora. His mother ran her antique business out of the bottom floor of the building.
The day it fell he and his friend were sitting on armchairs out the front. When it started to move they ran.
Two maintenance workers who were inside were almost out the front door when the building fell. Pablo and his friend pulled them out alive.
"The two workers that were inside confirmed that when they were running down the stairs she was coming down behind them but she didn't make it out," he says.
Maria's children hover among the rescue workers with their uncle Francisco.
A steady stream of volunteers comes past offering food to everyone who is there — cooked chicken, sandwiches, and coffee.
Locals chatter about how the building was unsafe. They say it was badly damaged in the 1985 quake and never properly repaired.
Occasionally workers call for silence, listening for signs of life.
The sniffer dog is sent in, and the rescue workers meticulously move the rubble by hand.
Late in the day, they find Maria's body.
Her relatives hug rescue workers and thank them.
Francisco says they're glad to know that now, Maria is at rest.