BOSTON (CBS/AP) — About 10,000 Massachusetts electric customers remain without power after last weekend’s snow storm.

NStar was reporting over 9,500 outages Tuesday night, with Duxbury, Marshfield and Plympton among the hardest hit communities. The utility says it could be Thursday night before some get the power back.

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National Grid was reporting less than 500 outages as of 10 p.m. Tuesday night.

National Grid says more than 850 crews were working on the South Shore, and were being hampered by severe damage to lines and equipment, access challenges posed by snowdrifts and unplowed and narrower-than-normal streets.

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Crews from 26 states and from Canada have arrived to assist and the utility expects to have all its customers back on line by Tuesday night.

About 400,000 homes and businesses in Massachusetts lost power at the peak of the storm Saturday.

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