California ISO issues Flex Alert for Wednesday As High Heat, High Electric Demand Forecast

The California Independent System Operator has issued a statewide Flex Alert, a call for voluntary electricity conservation, for tomorrow, Aug. 17, from 4 p.m. to 9 p.m., due to predicted high temperatures pushing up energy demand and tightening available power supplies.

Pasadena Water and Power generates electricity at the Glenarm Power Plant in Pasadena but as part of the state’s electric grid complies with ISO directives and requirements.

With above-normal temperatures in the forecast across much of the state tomorrow, the power grid operator is expecting an increase in electricity demand, primarily from air conditioning use, and is calling for voluntary conservation steps to help balance supply and demand.

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 less solar energy.

Reducing energy use during a Flex Alert can help stabilize the power grid during a time of tight supply conditions and prevent further emergency measures, including power outages.

Conservation Tips

Tomorrow, before 4 p.m., Californians should pre-cool home by setting the thermostat to as low as 72 degrees. Use major appliances, including washer and dryer, dishwasher, and oven and stove for pre-cooking and preparing meals. Adjust blinds and drapes to cover windows.

Tomorrow, during the Flex Alert from 4 p.m. to 9 p.m, Californians should set their 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.