The Oncor outage map shows that many customers are in Garland, Rowlett and Fate. The number of customers without power started to decrease around 11 a.m.

GARLAND, Texas — Over 23,000 people in and around Rockwall and Dallas County were without power on Sunday morning, the city of Rowlett said. 

The Oncor outage map shows that many customers in Garland, Rowlett and Fate lost power on Sunday morning. The number of customers without power started to decrease around 11 a.m. 

About 10,000 people in Dallas County lost power, and over 2,500 people in Rockwall County lost power, according to the Oncor map. Rowlett said the number of people affected is much higher, about 23,279 Oncor customers. 

In a social media post, the city of Rowlett said the outage was caused by an issue with a main transmission line. It’s not clear when power will be restored, the city said.

An Oncor spokesperson said the company does not have an ETA on when everyone’s power will be restored, but power was mostly back on around noon. 

They said the outage is due to an equipment issue on the transmission level, which explains the widespread nature of the lost power. 

The spokesperson said the company was restoring customers by rerouting power through different lines. Oncor crews are also onsite working to resolve the issue with the company’s equipment as it continues to reroute power, the spokesperson said.