At the Boise Airport July 1, air temperature reached 110 degrees Fahrenheit, just one degree shy of Boise's all-time, high-temperature record set in 1960. Under the sweltering conditions of the heat wave, Idaho Power, thanks in large part to its coal-fired power plants in Nevada, Oregon and Wyoming, pumped out record amounts of power to run air conditioning through hundreds of thousands of its customers' homes.
A megawatt (MW) is 1,000 kilowatts (KW) or 1 million watts. Powering a 100-watt light bulb for four hours consumes 400 watt hours (WH) of energy. The average home in the Idaho Power service area consumes 1,050 kilowatt hours (KWH) per month or 12,600 KWH per year. In 2012 Idaho Power served 416,020 residential customers, 66,039 commercial and industrial customers, and 19,045 irrigation customers.