As the crews arrived on the scene, flames were pouring out from the back of the house. Firefighters launched an intense effort to get the blaze under control.

Once the fire was extinguished, they found three people inside the home.

Jerilynn and another adult — whose name has not yet been publicly released — were both killed in the fire.

“She just rang the bell,” Jerilynn’s father, Jerry Brown, told KMBC, referencing the emotional hospital tradition marking the end of cancer treatment.

Jerilynn had battled osteosarcoma, a rare and aggressive form of bone cancer, for two years. She was finally discharged from Children’s Mercy Hospital in Kansas City in late June, and her family was just beginning to look ahead — until this devastating twist.

Smoldered for hours

Fire officials say the fireworks had been set off the