Crews have repaired two substations that went down and interrupted electricity to a Central Texas city during the heat wave.
Officials in San Marcos says power was restored early Wednesday and residents are urged to conserve electricity.
A statement from the city of 53,000 says the substations went off around 10:30 p.m. Tuesday. Authorities are checking a lightning arrester that apparently malfunctioned, on a day when the temperature in San Marcos hit 100 degrees.
Officials didn't immediately say how many residents lost power in the city 30 miles south of Austin.
The Electric Reliability Council of Texas, which manages the state's electrical grid, on Tuesday urged conservation due to high temperatures and increased demand. The save-power request, one of several this month by ERCOT, was canceled Tuesday night.