Many Texans finally have electricity back after a deadly blast of winter this week overwhelmed the electrical grid and left millions shivering in the cold for days. But the crisis is far from over, with 7 million in the state ordered to boil their water before consuming it. And in Jackson, Mississippi, nearly everyone in the city of about 161,000 lost water service. More than 190,000 homes and businesses in Texas still had no electricity early Friday, down from about 3 million two days earlier. Utility officials say there could be more limited rolling blackouts. The extreme weather has been blamed for the deaths of at least 57 people.