For some Houstonians in the U.S. state of Texas, this Christmas is a tragedy, with two fires on Christmas Eve and Christmas, which killed two people and injured three others.

Houston Fire Department confirmed Tuesday that an 83-year-old woman died after a Christmas morning house fire. It was not clear what caused the fire, or whether the elderly woman was living by herself.

Firefighters pulled the woman from her home, where she had been found unconscious at the bottom of the stairs near the kitchen.

On Monday, the Christmas Eve, a boy was killed in a southwestern Houston apartment fire. Dozens of families were displaced after the deadly fire.

The child's age was not confirmed by the department, but family members at the scene said he was 10 years old.

Three other people including the boy's father and a firefighter, were injured in the blaze, said the fire department.

As people celebrate Christmas with families and friends, Houston Police Department (HPD) issued a safety instruction, asking people to be alert while shopping, parking vehicles, or traveling.

HPD also suggested that people make videos or take photos of their valuable items at home and list them on the official HPD "Operation I.D." brochure.

"This is especially good for insurance purposes in case of burglary or fire," said the instruction.