Here’s what you need to know: • 2 million Texas households are without power • Dallas urges residents to reduce their electricity usage • Houston mayor seeks answers on how outages were handled • Texas cities open emergency shelters • 100,000 Fort Worth residents receive boil water notice • State sending extra resources to help across Texas The state’s electric grid operator lost control of the power supply Monday morning as 2 million Texas households didn’t have heat or other electric appliances working at home while a massive winter storm delivered freezing temperatures across the state. When the state’s grid operator, the Electric Reliability Council of Texas, began ...