PHILADELPHIA (CBS) — We are in the middle of what is being called the longest and most intense heat wave of the summer and Friday is a record breaker.

The high temperature Friday was forecasted at 103 degrees, and as of 3 p.m., it topped 102, which breaks the record of 100 set back in 1957. The highest temperature on record for the month is 104 — set on July 3, 1966, and CBS 3’s Kathy Orr says there’s a chance we could tie that.

An Excessive Heat Warning remains in effect for the entire region until 8 p.m. Sunday. The warning was issued by the National Weather Service because it is too dangerous to be outdoors for an extended period of time. With high humidity, Heat Index values will be between 110-115° Friday.

Residents of the Delaware Valley are urged to take precautions to avoid heat stress. Drink plenty of water and stay in cool places.

The city of Philadelphia has set up a Heat Help Line (215-765-9040) for the elderly and those vulnerable to the high temperatures. It is active until 8 p.m. on July 24. The city’s cooling centers are also open.

VIEW: List Of Cooling Centers

VIEW: Heat Resources & Important Phone Numbers

VIEW: CBSPhilly ‘How To’ Beat The Heat Guide

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Power companies are urging customers to conserve energy.

Atlantic City Electric said in a statement, “While power supply in the region is expected to be sufficient to meet anticipated high demand, extreme heat also can stress electric system equipment. Atlantic City Electric is on alert to quickly address any equipment issues that may arise.”

Atlantic City Electric released the following energy-saving tips:

  • Set air-conditioning thermostats at 78 degrees and use an electric fan, which doesn’t require as much energy, and the air will seem cooler without sacrificing comfort.
  • Keep window shades, blinds, or drapes closed to block the sunlight during the hottest part of the day and retain cooler air inside your home or business.
  • Limit the use of electrically heated water and turn off non-essential appliances and as many lights as possible.
  • Limit opening refrigerator or freezer doors.
  • Postpone using high-energy appliances like electric stoves, washing machines, dishwashers and dryers until the evening.

At this time, there is no immediate end in sight to the sweltering temperatures. CBS 3 meteorologists say there is a chance to tie or break the record on Saturday with a forecasted high of 99 degrees. That record, of 99, was last set in 1991. The excessive heat warning remains in effect until 8 p.m. Sunday.

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