Southwest gripped by extreme heat wave

The first day of summer is forecast to bring some of the worst heat the southwestern U.S. has seen in years

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    A temperature sign reads 120 degrees as temperatures climb to near-record highs in Phoenix, Tuesday

    AP Photo/Ross D. Franklin
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    Kara Leavitt, picks up elastic booties for her 4-year-old dog Chase in Tempe, Ariz. on Tuesday

    AP Photo/Angie Wang
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    Crew members building the Loop 202 South Mountain Freeway take a break as temperatures climb to near-record highs in Phoenix, Tuesday

    AP Photo/Ross D. Franklin
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    A crew from Juarez Construction sits under their excavator during a break to avoid the heat in Tempe, Tuesday

    AP Photo/Matt York
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    A construction worker climbs onto a roof at sunrise to avoid the heat in Phoenix, Tuesday

    AP Photo/Matt York
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    Dana Wheeler, a civil engineer with Integra Engineering, wraps a wet headband around his head to combat the heat in Tempe, Tuesday

    AP Photo/Matt York
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    An American Airlines grounds crew member sits in a luggage cart at Sky Harbor International Airport to avoid the heat in Phoenix, Tuesday

    AP Photo/Matt York
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    Julio Ruiz of J.R.R. Roofing pauses in the heat as the temperature approaches 115-degrees in Tucson, Tuesday

    Rick Wiley/Arizona Daily Star via AP
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    Chris Mitchell sprays water on his face to cool off in a Darth Vader costume along the Las Vegas Strip, Tuesday

    AP Photo/John Locher
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    A man stands under a misting machine in Tempe, Monday

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    A departure sign at Sky Harbor International Airport shows regional jet cancellations because of a heat wave in Phoenix, Tuesday,

    AP Photo/Ross D. Franklin
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    People cross Las Vegas Boulevard during a heat wave in Las Vegas, Tuesday

    AP Photo/John Locher
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    A child uses the CityScape splash pad to stay cool as temperatures climb to near-record highs in Phoenix, Tuesday

    AP Photo/Ross D. Franklin
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    A woman walks along a row of misters in Tempe, Monday

    AP Photo/Matt York
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