The California Independent System Operator’s nerve center in Folsom, where it runs the state’s main electricity-transmission grid.
The California Independent System Operator’s nerve center in Folsom, where it runs the state’s main electricity-transmission grid. Randall Benton Sacramento Bee file photo
The California Independent System Operator’s nerve center in Folsom, where it runs the state’s main electricity-transmission grid. Randall Benton Sacramento Bee file photo

Flex Alert urges Californians to conserve energy Tuesday amid heat wave

August 29, 2017 12:09 PM

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