Soaring temperatures in the Tri-State area sent the use of electricity skyrocketing Friday, ultimately causing a number of power outages throughout the area.

According to PSE&G officials, about 20,000 customers statewide are in the dark as of 9 p.m. Friday. Of those without power include 15,000 outages that are heat related and 5,000 customers in the company's southern territory who lost power as a result of a storm that swept through the area.

In addition, service for 4,000 customers was interrupted in Jersey City and Hoboken at 4 p.m. when a power line serving a substation approached its emergency rating.

The utility says its proactively interrupting groups of customers to preserve the integrity of the power grid. Customers interrupted will have their power restored in about an hour from the initial outage. The rotating outages will last until 7 p.m.

Utility crews are currently responding to service interruptions in and around the area. The company has been advised by PJM, the regional grid operator, that power supplies are expected to be adequate to meet the increased demand. At this time, PJM has not issued any request to cut back on power.

Meanwhile, Con Edison officials said it planned to reduce voltage to certain neighborhoods in Manhattan and Staten Island due to problems on electrical equipment serving those areas.

The affected area in Manhattan includes approximately 37,000 customers and is bounded West 147th Street to the north, West 110th Street to the south, the East River to the east, and 7th Avenue to the west. It covers the neighborhoods of Central and East Harlem.

The affected area in Staten Island includes approximately 60,000 customers and is bounded by the Kill Van Kull waterway to the north, Raritan Bay to the south, The Narrows to the east and Bard Avenue and Manor Road to the west.

It covers these neighborhoods: New Brighton, St. George, Tompkinsville, Brighton Heights, Ward Hill, Stapleton, Grymes Hill, Clifton, Silver Lake, Rosebank, Ft. Wadsworth, Grasmere, Concord, Arrochar, South Beach, Ocean Breeze, Midland Beach, Grant City, New Dorp, and Dongan Hills.

The voltage reduction was done as a precaution to protect equipment and maintain service as company crews work to repair the problem. Con Edison is asking customers in the area not to use appliances such as washers, dryers, and other energy-intensive equipment and to turn off lights and televisions when not needed until the equipment problems are resolved.