 With frustration mounting as Houston residents spent another sweltering day in search of places to cool off, fuel up, and grab a bite to eat, a CenterPoint Energy executive faced a barrage from city leaders who wanted to know why it was taking so long to get the lights back on. Mayor John Whitmire bluntly called on the utility to do a better job. Late Wednesday, CenterPoint Energy said it had restored more than one million of the 2.26 million customers impacted by Beryl in the first 55 hours of its restoration efforts.