The manager of the state’s power grid extended a statewide Flex Alert through Thursday, urging residents to conserve energy in response to high temperatures, power plant outages and reductions in transmission-line capacity.
A National Weather Service heat advisory for the deserts is in effect until 8 p.m. High temperatures in the desert areas of San Diego and Riverside counties are
expected to be between 110 and 115 degrees, with a high of 118 possible in the Anza-Borrego Desert.
San Diego will be cooler, but still warm with highs 75 to 80 near the coast and 86 to 91 in the inland cities of El Cajon, La Mesa, Santee, Poway and Escondido.
The alert by the California Independent System Operator asks residents to cut back their power use, especially during peak hours of 2 p.m. to 9 p.m. The alert was initially issued only for Wednesday, but Cal-ISO later extended it through Thursday.
“Electricity supplies statewide are expected to be tight because of high summer temperatures driving up demand, power plant outages and transmission line import capacity reductions,” according to Cal-ISO. “Power imports may be limited today because of high temperatures in neighboring states.”
Cal-ISO officials said conservation is especially important in the late afternoon, when air-conditioning use tends to push electricity use to its highest point of the day.
The agency recommended that people conserve energy by setting thermostats at 78 or higher; using fans and closing drapes; turning off unnecessary lights and appliances; and using major appliances only in the morning or late evening.
City News Service contributed to this article.
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