Sept. 3 — Not surprisingly, when temperatures rise, the demand for electricity grows — mainly for air-conditioning. In Texas, where life would be unbearable without cooling, the power grid has been stretched to the limit. On at least a dozen hot afternoons this summer, the state’s grid operator, ERCOT (Electric Reliability Council of Texas), has requested the utilities delivering power to ask their customers to voluntarily reduce consumption. Twice in early August, ERCOT declared Energy Emergency Alerts when reserves dipped below 10% with 5.2 gigawatts of power offline for maintenance.

— Texas Tribune