It’s another hot day, with more warnings about the state’s power grid. This week’s electricity woes are being blamed, in part, on the state’s under-performing wind energy sites. Thomas Overbye at the Smart Grid Center says they’re cranking out just a fraction of what they expected, and you can’t force the turbines to spin. Fossil fuels, solar, and wind power fuels the Texas power grid. But those turbines are at about eight percent of what they usually produce.