Trip Doggett told lawmakers Tuesday morning that any unexpected drop in generation or spike in demand could lead to rolling blackouts.
ERCOT is responsible for managing the state's electric grid, while private companies generate the electricity. Many of those companies have complained in recent years that Texans don't pay enough for electricity for them to invest in new generation plants. Last month the Public Utility Commission raised rates to encourage more electricity generation.
Doggett said that electric supply will be tight this summer and warned the agency would likely declare Energy Emergency Alerts asking consumers to cut back on electricity use. But blackouts would only result if a plant shutdown.