JACKSONVILLE, Fla. -- As members of a 64-year-old woman's family come to terms with her death, fire investigators were trying to determine why her Westside home caught on fire early Wednesday.

The fire in the 2500 block of Orion Street was spotted by people on a passing school bus. Arsenio Plarr, who called Louvenia Sewell his aunt, was one of the people on that bus.

"I was telling the bus driver to stop and she stopped. I told her to call the police," Plarr said. "I kicked the door in and tried to run in a little bit, but I came back out because there was too much smoke in my face."

By the time firefighters pulled Sewell from the smoke-filled house, she could not be revived.

"She was good and kind and loved everybody," said the victim's brother, J.D. White.

Sewell is survived by a sister, brother, children and grandchildren.

"We are a close-knited family. One suffers, we all suffer," Sewell's sister, Verna Sumlar, told Channel 4's Emily Pantelides.

Fire-Rescue spokesman Tom Francis said that all four burners on the stove were found to be on, but they do not believe that caused the fire because it appeared to start in another part of the house. Relatives said the victim's home had heat.

Francis also said no working smoke detectors were found in the home.

"A public safety reminder, eight out of 10 fire deaths in this country are in the sanctity of one's home," Francis said. "It cannot be overstated that having a working smoke detection and ... insuring that you follow fire prevention techniques within your home."

This was the second house fire early Wednesday. Francis said firefighters responded to this fire at 6:45 a.m. in the 5600 block of Moncrief Road was started by a homeless man who lit a fire in the fireplace of an abandoned home trying to keep warm.

The man was not hurt and the fire was relatively minor, but it caused police to close Moncrief between West Edgewood Avenue and Dead A Avenue for almost two hours.

Police told Channel 4's Steve Douglas that the man, whose name was not immediately released, will be charged with trespassing.