For much of the week the Northeastern seaboard flickered close to a massive power failure. The halls of office buildings, their lights dimmed to conserve electricity, were restfully muted, without their usual operating-room fluorescence. That was the best to be said for it. As power companies imposed "dimouts"cutting their output of voltage as much as 8%air conditioners labored and sometimes failed.
The odd thing was that a mere change in the weatheran unexpected late-September hot spellcould bring one of the world's largest electric systems so close to total blowout. Public utility companies, which have encouraged customers to buy more appliances to consume...