Three children and their grandmother died in a Texas fire after trying to stay warm during power outages. Their mom survived

Loan Le and her grandchildren, Colette, Edison, and Olivia.

(CNN)When the power went out at Loan Le's house in the Houston suburb of Sugar Land, Texas, on Monday, she headed over to her daughter's home about five miles away.

Jackie Pham Nguyen and her three kids, Olivia, 11, Edison, 8, and Colette, 5, affectionately nicknamed Coco by her family, still had power and were happy to have more time with their Ba Ngoai, which means maternal grandmother in Vietnamese.
Power and water outages plagued the state of Texas last week amid an unusual deep freeze that sent many families like the Nguyen's into survival mode.
    "We thought we were really lucky because we still had power until the early evening," Nguyen said.
    When their power went out a few hours later, the family hunkered down, lit the fireplace and played board games and card games, she said.
    The kids tried to teach their grandmother some card games and the family had tired themselves out by around 9:30 p.m.
    "Tucked my kids into bed and really the next thing I know I'm in the hospital," Nguyen told CNN. "A few hours later the fireman and police officer came and said that no one else made it."

    The cause of the fire may never be known

    Nguyen doesn't fully remember what happened, she said, but recalls being on her first floor where her bedroom is and being unable to get upstairs to the children's bedrooms. She yelled for her kids.
    "I was just standing there screaming and screaming and screaming their names hoping they would come out of their rooms and basically jump over so that we could get out," she said. "I just remember feeling like it was so dark and I can still kind of hear everything crackling around me."
    Coco, Edison and Olivia Nguyen died in the fire.
    While Nguyen said she doesn't remember much else of the night, D