Last week's storm in Dallas, Texas, ranks as one of Oncor’s top three worst storms of all-time with total outages reaching in excess of 500,000 homes and businesses. As Oncor crews and contractors worked to restore power to affected customers, other homes and businesses lost power from the subsequent storm waves that followed last Wednesday’s initial storm.

Oncor had restored power to more than 380,000 homes and businesses as of last Friday. At that point, less than 120,000 homes and businesses remained without power.

“What made this storm so bad was the rhythmic succession of multiple waves of rain and lightning,” said Charles Jenkins, senior vice president. The National Lightning Detection Network reported approximately 45,000 lightning strikes occurred during the multiple waves passing through the Dallas/Fort Worth area. “The safety of more than 2,600 people who are out working to restore power is our first priority, lightning compounds an already very dangerous situation in which to work safely,” added Jenkins.

List of Oncor’s Top 5 All-Time Worst Storms

Storm Start Date

Customers Affected

1. June 1, 2004 1,407,760
2. May 2, 2007 623,892

3. June 10, 2009

500,000 (current projection)

4. April 9, 2008 488,689
5. June 10, 2003 430,006

Oncor opened the System Emergency Center at 8 p.m. on Wednesday, June 10. The center remained open around-the-clock until major repairs were completed.