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California faces a severe energy shortage this coming summer. Last August, more than 800,000 homes and businesses went without power for two days, and the punishing heatwave also affected nearby states. The state’s Independent System Operator Corporation (ISO) ordered rolling blackouts for the first time in more than 20 years, spelling trouble for the state’s economy. The future is problematic for those affected by energy shortages, and the looming threat of rolling blackouts is real.
Energy shortage could lead to rolling blackouts in California this summer.
Officials in California have warned that an energy shortage could hit the state this summer, exacerbated by drought, extreme heat, and wildfires. The state’s energy grid is currently equipped to meet peak demand under normal circumstances, but a severe heatwave and fires could cause rolling blackouts. More than 1,700 megawatts of power could be in short supply if the heatwave lasts long enough, and this would be equivalent to powering around 1.3 million homes. In addition, climate change may also be a factor, making the state vulnerable to rolling blackouts.
Last year, a sweltering heatwave caused rolling power outages in the state. In California, triple-digit heat is already straining the state’s electrical grid. The state’s grid operator has issued a flex alert, urging residents to reduce energy use from 5 p.m. to 10 p.m.

Lack of supply-demand planning
The state of California is baking under a record-breaking summer heatwave. In addition to a pipeline rupture that limited gas imports, climate change is fueling drought and severely curtailing hydropower supplies. Consequently, the California ISO has warned that the state will suffer rolling blackouts for the next few summers. The Midcontinent ISO, which operates a grid serving 42 million people in 15 states, has forecasted insufficient power generation for the summer months.
Some attributed the problem to California’s reliance on solar energy, but stakeholders say the problem is much more complex than that. Several factors are at play here, including increased demand and a lack of supply-demand planning. Some utilities in California have limited resources to purchase additional power from other states in case of a blackout.
The problems that led to California’s rolling blackouts have their roots in a sloppy energy trading market. It was not possible to anticipate demand one day ahead of time, and officials failed to buy enough power in advance. In addition, the grid’s trading made it impossible to identify tight supply conditions until the last minute. The failure to plan for climate risks led to rolling blackouts in California, which prompted social media speculation and finger-pointing among state agencies.
Impact of climate change
Recent reports have highlighted the impacts of climate change on electricity generation, but what does this mean for consumers in California? If the state continues to experience extreme heat and drought, it could affect the price and reliability of power in other parts of the country. California would see 72 hours of power shortages over 31 years in the worst-case scenario. If this happens, it could lead to the state purchasing more power from its northern neighbor.
The researchers examined temperature increases for three California cities during 2004, 2006, and 2050. They used data from three climate models – the HadCM3, the GFDL CM2.1, and the Met Office’s HadCM3 model. Although these models do not fully capture the uncertainty inherent in climate science, they have provided insight into how temperature patterns are likely to change. They found that the projected temperature increases in California are likely to be greater than they are currently.
According to the study, Californians could experience up to four times more heatwaves than today, causing electricity demand to spike. According to the researchers, this scenario would also increase electricity costs by approximately 30%.