FOLSOM, Calif. – The California Independent System Operator (ISO) issued a statewide Flex Alert, a call for voluntary electricity conservation, for today, Sept. 9, from 4 p.m. to 9 p.m., due to a prolonged heat wave pushing up energy demand and tightening available power supplies.
The ISO also issued an Energy Emergency Alert (EEA) 1, effective today from 4 p.m. to 8 p.m., which signals that supply deficiencies are expected, and market participants are encouraged to offer more energy bids.
With above-normal temperatures continuing in the forecast across much of the state, the power grid operator is expecting high electricity demand, primarily from air conditioning use, and is calling for voluntary conservation steps to help balance supply and demand.
The Flex Alert is scheduled between 4 p.m. and 9 p.m., when the grid is most stressed from higher demand and less solar energy. During that time, consumers are urged to conserve power by setting thermostats to 78 degrees or higher, if health permits, avoiding use of major appliances and turning off unnecessary lights.
To minimize discomfort and help with grid stability, consumers are also encouraged to pre-cool their homes and use major appliances before 4 p.m., when conservation begins to become most critical.
Reducing energy use during a Flex Alert can help stabilize the power grid during tight supply conditions and prevent further emergency measures, including rotating power outages.
For information on Flex Alerts, and to find more electricity conservation tips, visit FlexAlert.org.
Tips before a Flex Alert:
- Pre-cool home by setting the thermostat to as low as 72 degrees
- Use major appliances:
- Washer and dryer
- Oven and stove for pre-cooking and preparing meals
- Adjust blinds and drapes to cover windows
Tips during a Flex Alert from 4 p.m. to 9 p.m.:
- Set thermostat to 78 degrees or higher, if health permits
- Avoid using major appliances
- Turn off all unnecessary lights
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.
Follow developing grid conditions at the ISO’s News webpage, under the System Conditions Bulletin, or follow us on Twitter at @California_ISO.
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.