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The Western US states are bracing themselves for one of their worst-ever summer heatwaves.
Temperatures are surging, reaching a blistering 53 degrees Celsius in California's Death Valley - that's 128 Fahrenheit.
The heat, and a lack of rainfall, has led to unprecedented water shortages.
Including at America's largest reservoir - Lake Mead, in Nevada, which powers the mighty Hoover Dam.
And the probable reason for these temperature extremes is, say many experts, devastatingly simple. Climate change.
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