Flex Alert issued for next two days, calling for statewide conservation

August 18, 2020


California-ISO

Consumer conservation has been effective in helping the grid

FOLSOM, Calif. – The California Independent System Operator (ISO) credits energy conservation from consumers for averting expected power outages yesterday, and urges Californians to continue being thoughtful about energy use during this long and extreme heat wave.

A statewide Flex Alert, a call for voluntary electricity conservation, will be in effect for today and tomorrow from 3 p.m. to 10 p.m.

California's record-breaking persistent heat wave has put extraordinary strain on the ISO electric system, as air conditioners are working harder and longer to keep spaces cool during the high temperatures. Because of high heat and limited energy supplies, rotating power outages are likely over the next two days.

The ISO declared a Stage 2 Emergency yesterday afternoon to prepare utilities to start rotating power outages throughout California. The rotating outages are implemented to prevent more widespread and serious loss of power. But cloud cover, along with conservation efforts, pushed demand down and prevented the grid operator from ordering load shedding.

With today's temperatures forecast above normal again, consumers can continue to take stress off the grid by lowering energy use during the most critical time of the day, 3 p.m. to 10 p.m., when temperatures remain high, and the sun is setting, removing thousands of megawatts of solar power from the system.

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 recognizes that reducing energy use during the hot time of the day is a hardship, especially for those working from home or with children schooling at home. However, if a large number of consumers do their part in small ways, conservation can make a difference.

Between 3 p.m. and 10 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 3 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 morning or during the night.

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

Sign up for
Flex Alerts

Monitor grid conditions on Today's Outlook

Download 
ISO Today app

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. Glossary of terms and acronyms

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.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are
subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions
and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.

Flex Alert issued for today, calling for statewide conservation

August 17, 2020


California-ISO

Reducing energy use could avert rolling power outages during heat wave

FOLSOM, Calif. – In an effort to prevent or limit power outages during this heat wave, the California Independent System Operator (ISO) issued a statewide Flex Alert, a call for voluntary electricity conservation, for today and extending through Wednesday. The Flex Alerts are in effect from 3 p.m. to 10 p.m. each day.

California's record-breaking persistent heat wave has put extraordinary strain on the ISO electric system, as air conditioners are working harder and longer to keep spaces cool during the high temperatures. Because of high heat and limited energy supplies, rotating power outages are likely over the next two days.

Consumers can take stress off the grid by lowering energy use during the most critical time of the day, 3 p.m. to 10 p.m., when temperatures remain high, and the sun is setting, removing thousands of megawatts of solar power from the system.

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 recognizes that reducing energy use during the hot time of the day is a hardship, especially for those working from home or with children schooling at home. However, if a large number of consumers do their part in small ways, conservation can make a difference.

Between 3 p.m. and 10 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 3 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 morning or during the night.

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

Sign up for
Flex Alerts

Monitor grid conditions on Today's Outlook

Download 
ISO Today app

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. Glossary of terms and acronyms

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.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are
subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions
and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.

Flex Alert issued for next four days, calling for statewide conservation

August 16, 2020


California-ISO

Consumers should prepare for the likelihood of rotating electric outages

FOLSOM, Calif. – The California Independent System Operator (ISO) issued a statewide Flex Alert, a call for voluntary electricity conservation, beginning today and extending through Wednesday. The Flex Alerts are in effect from 3 p.m. to 10 p.m. each day.

A persistent, record-breaking heat wave in California and the western states is causing a strain on supplies, and consumers should be prepared for likely rolling outages during the late afternoons and early evenings through Wednesday. There is not a sufficient amount of energy to meet the high amounts of demand during the heatwave.

However, consumers can actively help by shifting energy use to morning and nighttime hours and conserving as much energy as possible during the late afternoon and evening hours. Consumer conservation can help lower demand and avoid further actions including outages, and lessen the duration of an outage.

Consumers are urged to lower energy use during the most critical time of the day, 3 p.m. to 10 p.m., when temperatures remain high and solar production is falling due to the sun setting.

Extended periods of heat also can cause generator equipment failures that can lead to more serious unplanned losses of power.

The ISO recognizes that reducing energy use during the hot time of the day is a hardship, especially for those working from home or with children schooling at home. However, if a large number of consumers do their part in small ways, conservation can make a difference.

Between 3 p.m. and 10 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 3 p.m.:

  • "Pre-cool" their homes, or lower air conditioning thermostats to 72 degrees.
  • 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.

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

Sign up for
Flex Alerts

Monitor grid conditions on Today's Outlook

Download 
ISO Today app

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. Glossary of terms and acronyms

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.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are
subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions
and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.

Statewide Flex Alert Issued for Today, Calling for Energy Conservation

August 14, 2020


California-ISO

Power grid operator predicts high heat and increased demand for electricity

FOLSOM, Calif. – The California Independent System Operator (ISO) has issued a statewide Flex Alert, a call for voluntary electricity conservation, from 3 p.m. to 10 p.m. today.

With excessively high temperatures forecast for California, the power grid operator is predicting an increase in electricity demand, primarily from residential air conditioning use. Conservation efforts could be critical to maintaining reliability on the power system.

California and the Southwest US will be experiencing near-record or record-breaking heat, up to 10-20 degrees above normal in some areas. Above-normal temperatures for the West, including California, are expected to last through the weekend and into late next week.

Prolonged heat over several consecutive days is expected to drive electricity demand higher, as nighttime temperatures are also forecast to be above average. Remnants of a tropical system are expected to bring cloud cover to areas of California through this event, reducing solar generation, which leads to tighter energy supplies.

Consumers are urged to conserve electricity, especially during the late afternoon and early evening, when the grid is most stressed due to higher demand and solar energy production falling. Consumers are urged to set air conditioner thermostats to 78 degrees or higher, turn off unnecessary lights, and use major appliances before 3 p.m. and after 10 p.m.

These conservation measures can help the power grid during a time of tight demand and supply. Reduced energy use during a Flex Alert can prevent further emergency measures, including rotating power outages.

The ISO will continue to monitor the situation and provide updates as necessary. For information on Flex Alerts, and to get more electricity conservation tips, visit the ISO’s Flex Alert website.

Sign up for
Flex Alerts

Monitor grid conditions on Today's Outlook

Download 
ISO Today app

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. Glossary of terms and acronyms

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.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are
subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions
and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.

Statewide Flex Alert Issued For Friday Calling Energy Conservation

August 13, 2020


California-ISO

Power grid operator predicts high heat and increased demand for electricity

FOLSOM, Calif. – The California Independent System Operator (ISO) has issued a statewide Flex Alert, a call for voluntary electricity conservation, from 3 p.m. to 10 p.m. on Friday, Aug. 14.

With high temperatures in the forecast, the power grid operator is predicting an increase in electricity demand, primarily from residential air conditioning use.

The National Weather Service has issued excessive heat watches and warnings for portions of California and the Southwest US. California will be experiencing near-record or record-breaking heat, up to 10-20 degrees above normal in some areas. Above-normal temperatures for the West, including California, are expected to last through the weekend and into late next week.

Prolonged heat over several consecutive days is expected to drive electricity demand higher, as nighttime temperatures are also forecast to be above average. Remnants of tropical system “Elida” will bring cloud cover to areas of California through this event, reducing solar generation, which leads to tighter energy supplies.

Consumers are urged to conserve electricity, especially during the late afternoon and early evening, when the grid is most stressed due to higher demand and solar energy production falling. Consumers are also asked to turn off unnecessary lights, use major appliances before 3 p.m. and after 10 p.m., and set air conditioner thermostats to 78 degrees or higher.

These conservation measures can help the power grid during a time of tight demand and supply, and avoid power interruptions. Reduced energy use during a Flex Alert can prevent further emergency measures, including rotating power outages.

The ISO will continue to monitor the situation and provide updates as necessary. For information on Flex Alerts, and to get more electricity conservation tips, visit the ISO’s Flex Alert website.

Sign up for
Flex Alerts

Monitor grid conditions on Today's Outlook

Download 
ISO Today app

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. Glossary of terms and acronyms

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.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are
subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions
and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.