UPDATE: Authorities say Ruby Clark has been found and is safe.
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A Silver Alert has been issued for 78-year-old Ruby Clark.
Authorities say Clark was last seen walking away from her home on the 5000 block of Burke Road in Madison at 9 p.m. Wednesday. She was wearing gray sweatpants and a gray T-shirt. She wasn't wearing shoes. She is 5 feet tall and about 115 pounds.
Authorities say she is hard of hearing.
If you see Clark, call Madison Police at (608) 255-2345.