Cal ISO issues statewide flex alert for Friday afternoon – CBS San Francisco


FOLSOM (CBS SF) – The California Independent System Operator (ISO) issued a statewide Flex Alert on Friday, citing extreme heat across much of the state and a potential capacity shortage on the state power grid.

The Flex alert due to the expected high demand for electricity will be in effect from 4 p.m. to 9 p.m., officials said. Consumers have asked to voluntarily conserve energy during this period.

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“Such conservation would help ease the strain on the grid during critical evening hours when solar power is depleted or no longer available,” read the statement released by Cal ISO.

The national meteorological service issued an excessive heat warning in effect from noon Friday through 11 p.m. Sunday for interior valleys, foothills and mountains primarily in the far north and east of the greater bay area and beyond.

High temperatures will range from 100 to 115 degrees, with nightly lows mostly in the upper 60s to the mid-80s.

The release noted the success of the latest Flex Alerts – both last month as temperatures soared in mid-June and during last summer’s regional heat wave – when consumers collectively cut back significantly. their energy consumption. This has enabled grid operators to avoid or limit possible rotating power outages that may become necessary when demand for electricity exceeds capacity.

Some specific actions consumers can take to reduce energy consumption during Flex Alert include:

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  • Set thermostats to 78 degrees or higher, if your health permits
  • Avoid using large appliances, such as dishwashers and washers and dryers
  • Turn off all unnecessary lights

Consumers are also encouraged to use fans for cooling and to unplug unused electrical appliances.

In the hours before a Flex Alert goes into effect, consumers can take the following steps to help the state manage energy use later in the day:

  • Pre-cool your home by lowering the thermostat
  • If you must use your major appliances, do so earlier in the day when solar power is plentiful
  • Close window coverings to keep your home or apartment cool
  • Take advantage of solar power to charge electronics and electric vehicles so there is no need to do so later when solar power is not available

The above steps can also help people feel more comfortable while reducing their electricity use.

Once the Flex Alert is in effect, if demand continues to exceed supply, the ISO Cal will use other tools available to it for emergency conditions until those options are exhausted. ISO could order California utilities to reduce demand by implementing short-term rotating power outages to expand available electricity as much as possible.

Cal ISO said Thursday that spinning failures were not expected to be required. As California’s ability to store solar and wind power with batteries or other technology continues to improve, these crucial evening hours will be less difficult and similar emergencies more rare.

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For more information on Flex Alerts and for more tips on conserving electricity, visit Cal ISO’s Flex Alert website.

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