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Thousands were without power Monday night in Southern California, and at least one major outage was caused by Mylar balloons.

Southern California Edison: Search Outage Map

About 5,000 customers in an unincorporated part of South Los Angeles lost power about 4:30 p.m. because metallic balloons were caught in the electrical equipment, according to Southern California Edison.

The power is estimated to return by 6 a.m. Tuesday, according to the utility.

Metallic balloons are increasingly disrupting power to customers across the electrical grid, according to the utility. In 2015, Edison had 924 outages caused by metallic balloons, up from the previous high of 714 in 2012.

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