Texas is in danger of running short of electricity today and is asking residents and businesses to cut their power use from 3 to 7 p.m., the peak hours for demand. “We are expecting the statewide power supplies to be very tight over peak today, primarily due to the forecast for continued temperature extremes which causes higher than normal electricity use, and because of unexpected unit outages,” said Kent Saathoff, vice president of grid operations and system planning for ERCOT, the Electric Reliability Council of Texas. Shut off all unnecessary lights, appliances and electronic equipment, such as cable boxes and computers,