heat wave

Cal ISO Lifts Stage 3 Emergency Ending Statewide Rotating Outages

SDG&E initiated at least two waves of outages that impacted nearly 60,000 customers in the area

sdge power lines power outage shut offs

The California Independent System Operator (Cal ISO) directed San Diego Gas and Electric (SDG&E) to initiate rotating, hour-long outages Friday as a result of excessive heat driving up electricity use.

Cal ISO declared a Stage 3 Power emergency across the state at around 6:30 p.m., shortly after declaring a Stage 2 Emergency.

"CASIO has declared a 'Stage 3' power emergency because contingency reserves have fallen or are anticipated to fall below requirements and cannot be restored without service interruptions," SDG&E said in a release.

At one point more than 41,000 customers were without power, according to the outage map on SDG&E's website. Just after 8 p.m., about an hour and 20 minutes after the shut-offs were initiated, SDG&E reported all service had been restored.

The Cal ISO terminated the statewide Stage 3 Emergency about an hour later.

SDG&E said roughly 58,700 customers were affected by the power outages. The last time the Cal ISO issued a Stage 3 Emergency was May 8, 2001, according to a spokesperson.

Cal ISO issued its first Flex Alert of the summer on Friday urging residents to conserve energy as a heat wave sweeps across much of the state.

Flex Alerts are issued when the electricity grid is overtaxed due to high temperatures, Cal ISO said. It is a voluntary call on residents to conserve electricity when demand is at its peak.

The Cal ISO offered a series of tips to conserve power, including:

  • Turning off unnecessary lights
  • Using major appliances before 3 p.m. and after 10 p.m.
  • Setting air conditioner thermostats to 78 degrees or higher
  • Using fans
  • Keeping drapes drawn

More energy-saving tips can be found on the FlexAlert website.

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