AUSTIN, TX — With roughly a quarter of Texans still without power, the managers of the state's electrical grid Wednesday declined to say exactly when electricity would be fully restored, saying that the main factor in coming days would be the weather. Warmer weather could allow frigid power facilities to roar back to life, restore natural gas production, open up roads for skilled workers to make power repairs and cut demand from consumers, they said. "The best case is that today or tomorrow we're able to get back to the point that all consumers are experiencing outages no longer than 30 min...