A child sips water from a bottle under a scorching sun on Tuesday in Los Angeles. Forecasters say temperatures could reach as high as 112 degrees in the densely populated Los Angeles suburbs in the next week as a heat dome settles in over parts of California, Nevada and Arizona. (Frederic J. Brown/AFP via Getty Images)
A long, intense wave of excessive heat is hitting much of the Western United States for the next week.
The region should anticipate "a prolonged and possibly record breaking heat wave," with little relief overnight, the National Weather Service says. Heat watches and advisories stretch from Arizona to Washington state.
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