A 90-year-old woman is among ten dead in New York City after she wandered outside in frigid temperatures during the winter storm over the weekend, according to a neighbor.

Doreen Ellis, who had dementia, left her apartment in Brooklyn’s Crown Heights neighborhood overnight, walked halfway down the block and into the backyard of another building, where she was found dead Monday morning, her family and neighbors Zohran Mamdani held a press conference on Tuesday, when he confirmed that 10 people have died in the city as sub-freezing temperatures blasted much of the U.S.

The Office of the Chief Medical Examiner told winter storm could hit parts of the East Coast this weekend.

"This could be the coldest temperature seen in several years for some places and the longest duration of cold in several decades," the agency’s Weather Prediction Center warned Tuesday.

Officials in states afflicted with severe cold reported at least 50 deaths. They included two people hit by snowplows in Massachusetts and Ohio, two teenagers killed while sledding in Arkansas and Texas and a man found in his home in the Indianapolis area with no heat.

The Associated Press contributed to this report.