WOODBURY - ? Power is slowly but surely starting to come back on for Long Islanders after a record 90 percent of customers were knocked offline by the superstorm Sandy. By 11 p.m. Tuesday, the number of outages had dipped below 900,000. LIPA says it restored power to about 100,000 customers on Tuesday alone.

LIPA says it is launching a "massive response to the most devastating storm to hit Long Island in history." The utility says out-of-state crews from places including Virginia, Iowa, Michigan and California are out to assess the damages caused by Sandy. The restoration process is expected to be lengthy, and residents are being cautioned to prepare for outages that last at least seven to 10 days.

According to LIPA, if residents do not call to report outages, the utility may not know about them. Customers should call 1-800-490-0075 to report outages.

LIPA says it must focus on the backbone of the system, then the substations, and lastly its distribution line.

Officials are warning residents not to go near downed wires and instead to call 1-800-490-0050 to report them.

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Sandy Emergency Sources

To report an outage to LIPA: Call 1-800-490-0075. Text OUT to 695472LIPA outage map