Southern California Edison and Pacific Gas and Electric Co. customers filed lawsuits May 31 against the utilities, alleging that the companies failed to adequately analyze the potential health risks of wireless electricity meters, also known as “smart meters,” which they claimed cause “brain fog,” chronic fatigue, cancer, headaches, heart attacks, ringing in the ears, and interference with pacemakers. The California Public Utilities Commission ordered the utilities to install smart meters in order to build an intelligent, integrated electricity distribution network.