The department spokesperson Jacki Kelley says the sheriff's office wasn't sure if "Mrs. Appel" got the call.

9NEWS has learned the full name of the missing woman. She's 51-year-old Ann Appel.

Her family issued a statement on Thursday evening:

"We are urgently searching for Ann, and appreciate your prayers for her safety. We are deeply grateful for all of those helping in the search. Thank you for your concern and for respecting our privacy during this difficult time. Please continue to pray."

The sheriff's office says Appel has been missing since Tuesday. A specialized search team has been looking for her a several days now.

"That is a 34-person crew with six dogs. Four of those dogs are trained to search for live persons, two of those dogs are trained to search for human remains," Kelley said Thursday. "All six of those dogs are out. They've covered now about 140 acres. Obviously, that home is a center point, and they've gone out all four directions. And they'll be out as long as need to. We have not found anything yet."

Search crews have covered over 219 acres during their search.

9NEWS has learned Appel has two young sons. One attends college in California. 9NEWS has reached out to the missing woman's family and the family told us they may provide a statement.

Memorial services for the Samuel and Linda Lucas, the couple investigators say died in the fire, will be held Friday at Southern Gables Church.

Kelley says the Lucas family did receive the evacuation notice.

According to Kelley, 88 percent of the residents got the emergency notification. The sheriff's office is working with the company that provides the service to find out why 12 percent of the residents did not.

"We want answers as quickly as everybody else does," Kelley said.

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