New Delhi, Jan. 27 -- Many in the U.S. faced another night of below-freezing temperatures and no electricity after a colossal winter storm heaped more snow Monday on the Northeast and kept parts of the South coated in ice. At least 30 deaths were reported in states afflicted with severe cold.

Deep snow - over a foot (30 centimeters) extending in a 1,300-mile (2,100-kilometer) swath from Arkansas to New England - halted traffic, canceled flights and triggered wide school closures Monday. The National Weather Service said areas north of Pittsburgh got up to 20 inches (50 centimeters) of snow and faced wind chills as low as minus 25 degrees Fahrenheit (minus 31 degrees Celsius) late Monday into Tuesday.

The bitter cold afflicting two-third...