Conservation Needed Earlier in Day; Flex Alert Issued for 2 to 9 p.m.

South San Francisco, CA  August 19, 2020 Submitted by California ISO

With the state’s heatwave dragging into its sixth day, the California Independent System Operator (ISO) is asking for the public’s help this afternoon by reducing energy use earlier than a typical Flex Alert.

A statewide Flex Alert, a call for voluntary electricity conservation, will be in effect from 2 p.m. to 9 p.m. today. Consumer response to the Flex Alerts has been instrumental in averting power loss for two straight days.

With temperatures forecast above-normal again today, operators are expecting demand on the system to come in high, particularly in the mid-afternoon hours. California’s record-breaking persistent heatwave has put strain on the ISO electric system, primarily driven by air conditioning use across the state.

Rotating power outages are still possible if system conditions don’t improve. However, expected outages on Monday and Tuesday were prevented partly by consumers using less electricity in the most critical time of the afternoon and early evening, when temperatures remain high and solar production drops.

Conservation efforts during these times can prevent more dire measures, such as rotating power outages, or generator equipment failures that can lead to more serious unplanned losses of power.

The ISO understands that conserving electricity is difficult, especially for those working from home or who have children attending school at home. But if all Californians are thoughtful about their energy use, even in small ways, power interruptions can be avoided or limited.

Between 2 p.m. and 9 p.m., the ISO is urging consumers to:

  • Set air conditioning thermostats to 78 degrees, 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 2 p.m.:

  • Pre-cool their homes, or lower air conditioning thermostats
  • Pre-cook meals
  • Charge electric vehicles
  • Charge mobile devices and laptops
  • Run dishwashers, washing machines and other major appliances
  • Set pool pumps to run in the morning or during the night

For information on Flex Alerts, and to get more electricity conservation tips, visit the ISO’s Flex Alert website.

Click here to learn more about System Alerts, Warnings and Emergencies. Follow grid conditions in real time at ISO’s Today’s Outlook, or download the free ISO Today mobile app.


Conservation Tips
• Set thermostat at 78° or higher and turn off, if away
• Cool with fans and draw drapes
• Turn off unnecessary lights and appliances
• Use major appliances in morning or late evening
Learn more:  (Available in Spanish and Vietnamese)

Flex Alerts

A Flex Alert is issued by the ISO when the electricity grid is under stress because of generation or transmission outages, or from persistent hot temperatures.

Consumers are urged to voluntarily conserve electricity to help avoid more serious steps to protect the power grid, including local rotating outages.

Click here to learn more about Flex Alerts and Stage Electrical Emergencies.


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mel perry
mel perry
3 years ago

the real problem is, is that pg&e owns
the whores in sacramento, lot, stock
and bulging pockets,,
cpuc, and the enegry board, what is
needed, but not even planned is, an
increase in capacity (new sources of
enegry), a new or vastly improved
distribution system, note pg&e is
under no obligation to fix anything,
their only obligation is to the money
changers of wall street and management retirement packages
(almost 700 million for the last two
biggies), and to compound this
travesty, we keep building more
office buildings & houses, get use to
being without gas & electricity, this is
just the begining