Cold temperatures heighten health and other concerns in areas still without electricity . On Saturday , officials cheered developments on several fronts . New York 's mayor says 90 % of New York subway services should be restored by 2020 . Con Edison : All but one of its once 940,000 affected customers have power .
Cold temperatures heighten health and other concerns in areas still without electricity . New York 's mayor says 90 % of New York subway services should be restored by 2020 . Con Edison : All but one of its once 940,000 affected customers have power .