Update 4:32 p.m.: LIPA currently estimates 1,688 West Islip customers are without power.
Original: Four full days after Hurricane Sandy swept through the area, more than 1,600 West Islip homes and businesses are still without power.
The Long Island Power Authority estimates 1,643 customers in West Islip remain in the dark as of 4 p.m. Friday. That number is up from Thursday's figures, which .
More than 10,000 local customers in area were left powerless immediately following the storm.
A top official with LIPA said Friday it will take at least until next weekend to restore power to most of the communities it serves.
That estimate does not include portions of the area that were ravaged by flooding—particularly homes facing the Great South Bay.
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