Aging Transformers Pose Serious Long-Term Blackout Risk to US Power Grid

The United States power grid depends on thousands of large transformers, many of which are decades old and custom-built by hand. Unlike standard equipment, these transformers cannot be quickly manufactured or replaced, making the grid especially vulnerable. A significant failure of multiple units simultaneously could trigger a nationwide blackout lasting not days but potentially years. Experts warn that the aging infrastructure presents a serious national security and public safety concern. No widespread failure has occurred yet, but the risk grows as the equipment continues to age without adequate modernization.