The text alert worked. Emergency precautions lifted at 8 pm PT without the need for widespread blackouts. The utility added that residents’ energy conservation “played a big part” in bolstering the grid’s reliability.

The relief was short-lived. Just 15 hours later, the ISO issued another alert calling on residents to use less energy throughout the afternoon. Californians were encouraged to avoid using large appliances, unplug unused electronics, and set their thermostats no lower than 78 degrees.

“I can’t keep doing this,” Twitter user @sdfashionista3 wrote in response to the ISO on Thursday morning. “Been in San Diego my entire life never seen the temp this high at night even during a Santa Ana.”

And while the ISO’s Tuesday alert helped stave off rolling blackouts, more than 50,000 Californians experienced some form of a power outage that afternoon, according to data from poweroutage.us.

The strain on California’s power grid can be traced directly to climate change. Average temperatures have risen faster than residents’ heat tolerance, meaning Californians are running their air conditioning significantly longer than they did just years ago. Yet utilities companies and regulators haven’t bolstered the power grid accordingly, and soaring demand for electricity has pushed that infrastructure to the edge.

“Fossil-fuel based electricity has traditionally been seen as the most reliable,” Romany Webb, an associate research scholar at Columbia Law School and senior fellow at the Sabin Center for Climate Change Law, told Insider. “But the combination of gas being in shorter supply and more expensive, combined with these climate impacts, highlight that that’s really no longer the case.”

The alerts, while helpful on Tuesday, underscore the looming threat facing California and other states with hotter climates. Roughly 8 million Americans are already expected to experience temperatures above 125 degrees in 2022, levels deemed to pose “extreme danger,” according to the National Weather Service. That count is expected to reach 107 million people in 2053 as climate change powers higher and higher temperatures, according to new research from First Street Foundation.

California won’t be alone. All of Illinois and Missouri are set to feature 125 degree days by 2053, the foundation found. Parts of 23 other states will land in the belt.

Without massive investment in overhauling the country’s energy grid, such heat waves could knock out power across states for days on end. That endangers millions who can’t afford to cool down with a generator or a pool. A lack of power will also lead to widespread food spoilage as freezers and refrigerators shut down.

Countless business owners will be forced to close up shop, and those staying open won’t get much traffic as Americans focus on beating the heat.

Americans requiring powered medical devices will be in the most immediate danger, especially as blackouts can come at a moment’s notice.

“If we don’t accelerate our action to mitigate climate change and prepare for the climate change that’s already happening, we’re likely to see more of these outages and have a less reliable grid,” Webb said.

Europe’s decoupling from Russian energy presents an impossible choice

The EU and UK’s energy problem has far more to do with their dependence on Russia. While the US can largely rely on its own energy commodities for power despite its struggles with its antiquated electric grid, western Europe leans heavily on Moscow for its natural gas and crude oil to keep prices steady.

The relationship, while rocky, lasted for several decades. That ended when Russia invaded Ukraine in February 2022 and sparked intense backlash from the West. The EU and UK quickly levied sanctions on Russia’s energy sector, unveiling plans to quickly reduce their purchases of Russian goods and find those commodities elsewhere.

The pivot hasn’t been an easy one. Western Europe has struggled with energy shortages throughout the year, and summer heat exacerbated the problem. Crippling heat waves emerged in the UK, Spain, Portugal, and France, with all-time-high temperatures causing large wildfires and thousands of deaths.

The hot spell was particularly dangerous because many affected countries “are not really trained to deal with the heat,” George Havenith, Professor of Environmental Physiology and Ergonomics of Loughborough University, recently told Insider. 

Many businesses are already girding for a historic energy crisis. JPMorgan’s European offices have carried out power outage simulations in recent weeks to prep for outages, Reuters reported Wednesday. Deutsche Bank told the outlet it turned off hot water in bathrooms and changing office temperatures to cut down on energy use. The Euronext stock exchange said it has backup generators ready in case blackouts hit.

The heat wave has since eased somewhat, but Russia’s retaliation to energy embargoes kicked off a new stage of pain. The UK and EU haven’t fully weaned themselves off of Russian gas yet, leaving energy in shorter supply as the Kremlin cuts off westward flows.

That’s left residents paying up for their everyday power needs. Britain’s energy regulator lifted its cap on annual energy bills to £3,549 — about $4,189 — starting October 1, nearly doubling the previous limit and up 178% from last winter.

The hike presents low-income Britons with an impossible choice: go into debt to maintain their basic energy use, or endure a blazing hot summer and frigid winter rife with blackouts and health hazards.

Prime Minister Liz Truss announced Thursday — only her third day in office — that the government will cap households’ annual energy bills at £2,500 ($2,880) starting October 1, mitigating some of the effects of soaring costs. The British government will pay the remainder of the bill, and while the government hasn’t announced the entire cost of the measure, it’s likely to be one of the priciest economic interventions the UK has seen in decades.

Immediate solutions to the energy crisis are few and far between, but such price controls “must be on the table” to curbing inflation, Martin Wolf, chief economics commentator at the Financial Times, said in a Sunday column.

Yet as climate change rages on, the impetus to reinforce electrical grids with renewable power and efficient energy storage grows stronger.

“Unless we recognize the serious risks that climate change poses to our electrical system, we’re likely to see more of these reliability issues,” Webb said. “It’s imperative that regulators, electric utilities, and system operators recognize that climate change is here.”