(Reuters) California's electricity grid operator issued a rare statewide alert on Thursday warning residents to curb power usage in coming days as a heat wave threatens to strain its already taxed network.
The California Independent System Operation, or CAISO, a not-for-profit corporation charged with operating the majority of the state's high-voltage grid, issued a "flex" alert urging consumers to reduce power usage especially in the afternoon, when air-conditioning dramatically ramps up demand.