2007 Western North American heat wave

The 2007 western North American heat wave was a record-breaking event that began in late June 2007. The heat stretched from Mexico to Alberta, Saskatchewan, Manitoba and into northwestern Ontario. The record heat has exacerbated already present record-breaking drought conditions in much of the Western U.S., allowing fires to grow to record-breaking sizes.

The combination of conditions forced major freeway closures, animal and human deaths, evacuations, and destruction of property.

Much of eastern North America experienced more average conditions through July 2007, with little in the way of prolonged heat waves. However, drought remained a problem in some areas of the east, particularly parts of the southeast.

Reno, Nevada, reached 108 °F (42 °C) on July 5 easily breaking the previous record of 100 °F (38 °C).

At 116 °F (47 °C), Las Vegas, Nevada, was one degree shy of its all-time record set in 2005 and 1942.

St. George, Utah, reached 118 °F (48 °C) on July 5, according to the local weather station as mentioned in the front page of the July 6 edition of The Salt Lake Tribune, which would be the highest temperature ever-recorded in Utah.

Eastern Oregon set 15 different record highs on July 5.

There were 11 days of triple digit temperatures in Missoula, Montana, almost double the previous record of 6 days for the month of July.

Many major cities experienced prolonged intense and unusual heat in Canada, the United States, and Mexico. It was the hottest July on record for the entire states of Idaho, Montana, and Wyoming, and second hottest for Nevada.

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