Texas grid back to 'normal conditions' after state's energy demand nearly surpassed supply
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Texas power grid returned to normal conditions after entering emergency alert level to conserve energy
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Demand for electricity nearly exceeded supply due to high temperatures and low wind/solar generation
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ERCOT issued appeal for Texans to conserve energy during 3-hour period
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At peak, demand was within 2,000 megawatts of exceeding supply capacity
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Entering emergency alert levels gives ERCOT access to additional power reserves to prevent outages