NEW : Federal offices in Washington to be closed indefinitely . More than 300,000 from Pennsylvania to Washington without electricity Sunday morning . Dulles Airport resumed some service ; flights still canceled at Reagan National , however . 32.4 inches of snow at Philadelphia , old record .
NEW : Federal offices in Washington will be closed Monday . More than 300,000 from Pennsylvania to Virginia without electricity Sunday morning . Dulles Airport resumes some flights ; flights still canceled at Reagan National , BWI . 32.4 inches of snow at Dulles breaks old record .