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The ISO New England control room is seen in this undated photo. (ISO-NEW ENGLAND PHOTO)

CONCORD — The New England power grid is vulnerable in winter, and this year it is in an even more precarious situation due to energy supply chain issues and a changing global natural gas market.

Officials from ISO-New England  — an independent system operator created in 1997 to operate regional power system, implement wholesale markets and ensure open access to transmission lines — said Monday if generators lack access to enough fuel, and a prolonged cold snap grips the region, rolling blackouts may be needed to prevent the entire grid from crashing.

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