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In the meantime, Mr. Bloomberg appointed Brad Gair, an emergency management specialist, as chief of housing recovery operations, with responsibility for overseeing the city’s efforts to find shelter for those left homeless by the storm.

At a news conference, the mayor asked for patience after reporters pressed Mr. Gair for more specifics on how he intended to deal with the problem, noting Mr. Gair had been on the job only four hours.

“I want to assure everyone that every New Yorker who needs a warm place to live and a roof over his or her head is going to have one,” Mr. Bloomberg said.

The storm killed more than 100 people in 10 states but vented the worst of its fury on New Jersey and New York. A week after the storm slammed the mid-Atlantic and the Northeast, 1.4 million homes and businesses remained in the dark, mostly in New York and New Jersey.

AP writers Michael Hill, Larry Neumeister, Cara Anna, Christina Rexrode, Alicia Caldwell and Frank Eltman contributed to this report.