Electricity has become a commodity that everyone depends on in order to survive. From charging our devices and lighting our homes to powering our trains and powering our cities, electricity has become important for civilization. But what keeps the electricity flowing is the power grids that deliver electricity to the rest of the world. A key vulnerability that has put power grids in the U.S at risk comes from climate change as heat waves across the U.S put ever-increasing strain on them.
Extreme temperatures have proved to be a great risk to power grids as a current heat wave in the United States is encompassing approximately two-thirds of the nation. In late June, New York City experienced a loss of electricity as the city's power provider, Con Edison, reduced electricity sent to residents as it repaired damages to the power system. Thousands were left without electricity as the power grid was unable to handle the strain. Throughout the nation, similar events occurred as heat waves caused the railroad corporation, Amtrak, to report delays due to restrictions on speed in routes through Washington, New York, and Philadelphia, as there was a lot of heat in those areas.
Parts of the Midwest, Texas, and southern California are reported to not have enough power reserves to operate in conditions that are above average, thanks to an assessment from the North American Reliability Corporation (NERC). The trend of major power outages in the U.S has grown considerably from 2000 to 2023. Power outages have affected millions of people in the US and have cost billions of dollars every year, with larger amounts of power outages increasing the impact. As reported by Climate Central, 80% of major power outages in the U.S were caused by the weather. Extreme weather, which includes heat waves, is becoming more frequent or intense due to climate change, which has placed an increased amount of stress on energy infrastructure that was not built for climate of the present day. During the years of 2014-2023, the number of weather-related outages was double that of the number of similar outages in the years of 2000-2009.
One of the main concerns regarding heat waves is the effect that they will have on AI data centres. As it has been introduced to society, AI has put a greater demand on power grids, with server farms' demand for power being estimated to increase to 12% by 2030. Estimates with regard to electricity demand show that it will only increase. A forecast by the International Energy Agency concluded that by 2030, the demand for electricity will increase by 25-30%. Since 1850, the average surface temperature of the world has increased by 1.1 degrees Celsius. All kinds of methods in which electricity is generated are at risk from extreme heat, as thermoelectric generators will have their efficiency and generation capacity decrease, while solar power will be affected as cooling systems will be damaged and can probably cause fires.
Solutions include: policymakers bringing the topic into mainstream conversation to prioritize the issue; policymakers and regulators cooperating with system operators to create long-term plans for heat waves and electricity supply security; incentives for electricity companies to invest in electricity systems resilient to increased heat; greater dialogue on the issue and greater investment from both companies and governments (federal and state) to build more power systems that can properly function during heat waves.