Aug. 13 — The Public Utility Commission agreed this spring to increase the amount generators could charge for producing power during periods of peak demand. If operating reserves dip below 2,000 megawatts of operating reserves the price adders would increase the price of power to $9,000 per megawatt hour, the highest price allowed in Texas.

Price adders are also phased in but are progressively lower when operating reserves range between 2,000 megawatts and 7,000 megawatts. The Texas power grid was operating under normal conditions on Monday but operating reserves were low enough during the hot afternoon hours that the addition of the upward price adjustments boosted the cost of electricity in Houston as much as 10 times.

— Houston Chronicle