The Sempra Energy storage site was closed until a safety review of its wells is completed, limiting the use of one of the largest natural gas reservoirs in the country. (Photo: Bloomberg)

(Bloomberg) – Millions of Californians might face blackouts this summer unless energy providers take steps including removing natural gas from the Sempra Energy storage site, which was closed after a historic leak.

Without tapping the site, power plants may not have enough access to natural gas on as many as 14 days to produce electricity in Southern California during certain peak-use times, according to a draft report issued Tuesday by agencies including the California Energy Commission, the California Public Utilities Commission, the California Independent System Operator and the Los Angeles Department of Water and Power. Fifteen billion cubic feet of gas is stored at Sempra’s Aliso Canyon field near Los Angeles.

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