By CBS13 Staff

SACRAMENTO (CBS13) — California energy officials are warning that the state is at risk of seeing rolling blackouts again this summer.

A California Independent System Operator (CAISO) report shows it is “cautiously optimistic” the lights will stay on in blistering heat.

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But, the agency continues to see potential challenges in meeting demand during extreme heatwaves.

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Last summer, more than 800,000 people lost power as CAISO conducted the first rolling blackouts since the state’s energy crisis two decades ago.

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CAISO says they’re making changes, like adding supply, to try and prevent more blackouts amid rising temperatures.