The heat wave has increased energy demand, but several factors, including energy efficiency, have helped ease the load on the system.
Industry and environmentalist groups agreed Tuesday on tougher efficiency standards for home appliances that, over the next 30 years, could save enough energy to power 40 percent of American homes for a year.
The chairman of the Federal Energy Regulatory Commission is committed to renewable energy.
New federal standards could cut energy bills by about $16 billion by 2030.
Incentives encourage homeowners to embrace energy efficiency.