The United States faces a significant risk of a prolonged, nationwide blackout lasting up to 18 months due to the aging and vulnerable state of its power grid, a former high-ranking energy official has warned.
Jon Wellinghoff, who previously chaired the Federal Energy Regulatory Commission (FERC), highlighted the grid's susceptibility to coordinated attacks. He noted that a precisely targeted strike on a few critical substations could disable the entire U.S. power system. Wellinghoff's concerns were amplified following a 2013 incident where gunmen attacked a Pacific Gas and Electric substation in California, disabling 17 transformers.
A FERC analysis conducted after the 2013 attack revealed that disabling just nine key substations across the nation's three main interconnections—Eastern, Western, and Texas—could plunge the entire country into darkness. Wellinghoff suggested that such an attack could be executed with relative ease and speed, potentially within 20 minutes.
Infrastructure Age and Replacement Challenges
The grid's vulnerability is compounded by its age. According to reports, over 75% of distribution transformers, the units commonly seen on street corners, are older than their 50-year expected lifespan. Large power transformers, crucial for major substations, had an average age of 38-40 years in 2014. The time required to replace these large transformers has dramatically increased, with wait times now stretching to 128 weeks since 2021, and some orders exceeding five years. This shortage is described by energy analysts as critically severe.
Demand for transformers is projected to more than double by 2027 compared to 2020 levels, exacerbating the existing supply chain issues. The scale of investment needed to upgrade the grid is immense, with projections suggesting that spending over the next 15 years will equal that of the past 150 years.
Following the 2013 Metcalf substation attack, it took PG&E 27 days to restore service. Wellinghoff emphasized that repairs during a nationwide blackout, without existing power infrastructure to aid the process, would likely take considerably longer than a single month, potentially extending to 18 months or more.
After learning about the analysis and the vulnerabilities, Wellinghoff briefed White House officials, members of Congress, and the Department of Energy, urging immediate action to address the risks.