Back to school could bring big power problems across Texas.

School air conditioners are already whining, and when classes start Monday, the state’s 8,317 public schools could strain the power grid.

“The main concern is as long as we’re still having these high temperatures, we’re going to have high electricity demand on the grid,” said ERCOT spokesperson Dottie Roark. “And whenever we have that high demand it means we’re tight on our capacity.”

Altogether, Texas schools add about 1500 megawatts of demand to the state’s power grid – enough to have caused rolling blackouts in both July and early August.

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