'Extreme' Heat Wave Blanketing Southwest US - NBC Boston
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'Extreme' Heat Wave Blanketing Southwest US

Temperatures are expected to reach a high of 122 degrees in Phoenix, while Las Vegas is expected to reach 117 degrees

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    NEWSLETTERS

    A new global study says deadly heat waves will grow in frequency, intensity and duration, affecting 75 percent of the world’s population if greenhouse emissions are not reduced. (Published Tuesday, June 20, 2017)

    Hot temperatures are forecasted for the Southwest Tuesday, with the National Weather Service describing the heat wave as "extreme even by desert standards," NBC News reported.

    The excessive heat warnings are in effect Tuesday, the official start of summer, for all of California and Arizona, as well as parts of Nevada, Utah and New Mexico.

    Temperatures are expected to reach a high of 122 degrees in Phoenix, while Las Vegas is expected to reach 117 degrees, according to the weather service.

    In California, residents were asked to conserve energy through Wednesday, as the high temperatures are expected to drive up air conditioner use.