The California Independent System Operator extended a Flex Alert for the ninth consecutive day Thursday, urging residents to take the following power-saving steps:
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Residents were also advised to pre-cool their homes as much as possible and close blinds and drapes to keep interiors cool.
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The voluntary conservation measures have worked so far, as the power stayed on Wednesday despite a high demand for electricity.
Cal ISO also issued an Energy Emergency Alert 2 Wednesday, which requests emergency energy from all of its resources and activates its emergency demand response program.
CA issues Energy Emergency Alert 2; residents strongly urged to cut back on energy use
Gov. Gavin Newsom for the first time triggered a wireless emergency alert system at 5:45 p.m. Tuesday that sent messages to 27 million cellphones urging them to turn off or reduce non-essential power.
California snapped its record energy use around 5 p.m. Tuesday with 52,061 megawatts, far above the previous high of 50,270 megawatts set July 24, 2006.
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"Had it not been for the efforts of, literally, millions of Californians, just to turn down a light or turn down a thermometer and not use a large appliance, we would not be in the position we are today," said Newsom during a press conference in Beverly Hills on Wednesday.
Southern Californians can expect a slight break from the intense temperatures this weekend but an excessive heat wave will remain in effect for much of the region through 8 p.m. Friday.
City News Service contributed to this report.