A punishing Texas heatwave is driving up power demand to the point where ERCOT is asking Texans to voluntarily reduce power use again on Wednesday.
The state's energy-grid operator made the same request on Monday.
Residents are asked to turn up thermostats, and not run major appliances between the hours of 2-8 p.m.
In May, the company asked Texans to conserve power during a heat wave that resulted in six power-plant outages.
ERCOT's statement said that no system-wide outages are expected at this time.