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Thousands of Southern California residents were left without power Tuesday as a brutal heat wave continued to bake the region, utility company officials said.

Some 5,500 customers — including residences and businesses — scattered across Los Angeles were affected as of 2 p.m. Most would probably have power restored by the evening, Department of Water and Power officials said.

Though the cause of the outages is being investigated, the heat wave that has sent temperatures skyrocketing into the triple digits and put record demand on the power grid — including because of increased use of air conditioners — was certainly a factor, said DWP spokeswoman Vonda Paige.

Some 1,900 customers in Hancock Park and 800 customers in Reseda were without power.

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