ANTIOCH -- A metallic balloon that floated into wires caused a one-hour power outage for 4,500 PG&E customers early Monday, a spokeswoman for the company said.

The outage first was reported at 5:11 a.m. and was restored by 6:11 a.m., PG&E spokeswoman Tamar Sarkissian said. Customers in various parts of Antioch were affected.

The electrical current can be affected by the balloons, and PG&E regularly encourages people to leave them indoors.

"If you do bring them outside, please make sure there's small weight on it," Sarkissian said. "That will keep it from floating away."

Customers also were reminded to treat any downed power line as if it were live and to call PG&E immediately.

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