Pakistan, Jan. 27 -- A massive winter storm swept across the United States, killing at least 30 people and leaving more than 540,000 without power. Cities from New Mexico to Maine were hit by heavy snow, sleet, freezing rain, and strong winds. Authorities warned that life-threatening cold could continue through February 1, complicating recovery efforts.

The National Weather Service said record-low temperatures struck southern states unaccustomed to extreme winter weather. Northern states received over two feet of snow in some areas, including 22 inches in parts of Connecticut and 16 inches in Boston. Thousands of flights were canceled, and roads became impassable due to snow and ice.

Read more: US storm leaves 850,000 without power; 10,...