Peninsula Clean Energy
Peninsula Clean Energy


July 12, 2021

FLEX ALERT JULY 28 – Please reduce electricity use from 4 p.m. to 9 p.m.

The California Independent System Operator (ISO) has issued a statewide Flex Alert, a call for voluntary electricity conservation.

With high temperatures in the forecast and high demand for electricity predicted,  the California Independent System Operator (ISO) issued a statewide Flex Alert, a call for voluntary  electricity conservation, for  July 28 to help stabilize the state’s electric grid and deal with uncertainty created by the extraordinary conditions.

Energy reduction during a Flex Alert can prevent further emergency measures, including rotating power outages. Between 4 p.m. and 9 p.m., the ISO is urging consumers to:

  • Set air conditioning thermostats to 78 degrees or higher, if health permits.
  • Defer use of major appliances.
  • Turn off unnecessary lights.
  • Unplug unused electrical devices.
  • Close blinds and drapes.
  • Use fans when possible.
  • Limit time the refrigerator door is open.


Consumers can also take steps to prepare for the Flex Alert by doing the following before 4 p.m.:

  • “Pre-cool” their homes, or lower air conditioning thermostats.
  • Charge electric vehicles.
  • Charge mobile devices and laptops.
  • Run dishwashers, washing machines and other major appliances.
  • Set pool pumps to run in the early morning or late at night.


Read the California ISO news release.