Update at 3:15 p.m.: Richardson has been found safe

Portland police are asking for the public's help to locate a 75-year-old woman with severe dementia last seen in Southeast Portland.

Margaret Richardson left her residence in Sunnyside at about 11:30 a.m. and was last seen around 2 p.m. near S.E. 33rd Avenue and Belmont Street, police said.

Police said Richardson has severe dementia and gets easily confused and disoriented. She isn't familiar with the neighborhood, police said, and isn't dressed for the cold weather.

She is 5-foot-5, 140 pounds, with brown and gray hair, blue eyes and wearing glasses. Police said she was last seen wearing black pants, black loafers and a black sweater with a white geometric design.

She doesn't have a purse or money, police said, but should be wearing an ID bracelet.

Police ask anyone seeing her to immediately call 911. Anyone with non-emergency information is asked to contact Detective Heidi Helwig at (503) 823-0797.

-- Rob Davis