Police say it's unlikely missing Auckland woman Pat Wearn is still alive.
After being missing for almost six days, police are continuing to search bush areas and residential properties in Torbay Reserve.
"Sadly we have now well passed the survivability expectations for Mrs Wearn, and though we are continuing the search today, tomorrow we will be reviewing our search options" says Inspector Sunny Patel.
The 73-year-old, who has Alzheimer's, left her home in Caversham Drive on Monday afternoon to go for a walk after shopping with her husband.
Police, LandSAR, Navy, Airforce and the fire service have been trying to find her.
"We are asking anyone who has been away on holiday and lives in the Torbay area to please search your property," says Insp Patel.
Anyone who has not been able to search their properties themselves is asked to contact North Shore police on (09) 477 5000.
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