The dry spell continued last month, with temperatures peaking at 82F (27.8C) - making it the hottest April for 350 years.
It reached 8,109 megawatts, not surprisingly, just about when the temperature peaked.
In Phoenix, it was at least 110 every day from July 11 to 19; on Friday the temperature peaked at 108.
The temperature hovered around 70 on Saturday and peaked yesterday at 76 degrees, breaking a record of 69 degrees set in 1942.
Average temperatures still peak at a blissful 77F, the equivalent of a hot summer's day in Britain - warm enough for sun-bathing but not oppressive.
Jon Lieber (7-3), facing his former teammates, allowed two runs in five and a third innings as temperatures peaked at 101 degrees.
The first two years after the temperature peaked were the worst.
Daytime temperatures peaked in the 20's across the region, and winds cranked up to 35 miles an hour, with gusts to 50.
Warm and dry conditions dominated the area throughout the afternoon; the temperature peaked at a high of 90 F (32 C) with moderate humidity.
The temperature peaked at 1:54 p.m. in Central Park.