DALLAS -- Authorities are searching for a woman who's been unaccounted for since a massive seven-alarm fire broke out at a Dallas condominium complex late Friday night.

"At this time, firefighters are still at the scene finding and extinguishing hot spots as they continue piercing debris piles with water throughout the building," said Jason Evans, a spokesman with Dallas Fire-Rescue Saturday evening. "A fire department presence will remain on site throughout the night, and into the morning, to make sure the fire doesn't rekindle."

American Red Cross estimated about 100 people have been displaced due to the destructive blaze.

Shortly before 11:30 p.m. Friday, firefighters were called to the Preston Place condominium complex in the 6200 block of West Northwest Highway, near Preston Road.

The fire escalated to a 7-alarm fire Saturday morning. More than 100 firefighters were called to the scene. The cause of the fire is under investigation at this time.

One person was sent to the hospital, but officials say that person is expected to be okay. Officials say their looking into the whereabout of 89-year-old Jacqueline McDonald.

McDonald has gray hair and brown eyes. She stands 5’6″ tall and weighs about 120 pounds. She also has dementia and may be confused.

If anyone knows the location of Jacqueline McDonald, they are asked to call 911 or call the Dallas Police Department Missing Persons Unit at 214-671-4268.