The woman says she went to visit her aunt around 7 a.m. and says she was unable to get up.
Police believe an unknown person entered the 89-year-old's apartment on 2440 Boston Road in Allerton early Friday and demanded money.
The suspect threw boiling water on the victim, causing severe burns.
Police transported the 89-year-old to Jacobi Hospital. She is currently in stable condition.
It is unknown whether anything was taken from the apartment.
Police are working on a description of the suspect.
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