A deadly winter storm that drove parts of the United States into a deep freeze over the weekend kept a tight grip on the nation on Monday, as bitter temperatures, snow and ice spread across the East Coast, snarling traffic and knocking out power to thousands.
Emergency workers searched for survivors in the rubble of homes, schools and a hospital in an Oklahoma town hit by a powerful tornado, but officials on Tuesday sharply lowered the number of deaths caused by the storm.
Hot and dry conditions in parts of middle America deepened an ongoing drought in many states over the last week, according to a climatology report issued Thursday.
