San Diego Gas & Electric Co. is relieved that temperatures eased Tuesday and Wednesday and “flex alerts” were no longer needed. The alerts urged customers to reduce their power use during the hottest times of the day—and lessen the risk of rolling blackouts. But some observers—such at U-T San Diego columnist Roger Hedgecock—wonder what the local utility is doing to shore up energy supplies. And what about the regular requests for rate increases? Does SDG&E lack energy in developing new power sources?