NEW YORK — Power generators are being marshaled, polling locations moved, and voting machines hurriedly put into place as officials prepare to hold a national election in storm-ravaged sections of New York and New Jersey barely a week after Hurricane Sandy.

Organizers expressed guarded confidence Sunday that the presidential vote will proceed with no major disruptions in most areas hit by the storm, though it was unclear whether the preparations would be enough to avoid depressed turnout in communities where people still lack power or have been driven from their damaged homes.