A construction worker drinks water in temperatures that have reached well above triple digits in Palm Springs, California, on June 20.  More than 85% of Americans are bracing for temperatures above 90 degrees Fahrenheit through the weekend.
Mandatory Credit:	David Swanson/Reuters

A construction worker drinks water in temperatures that have reached well above triple digits in Palm Springs, California, on June 20. More than 85% of Americans are bracing for temperatures above 90 degrees Fahrenheit through the weekend.
Mandatory Credit: David Swanson/Reuters

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Dangerously high temperatures will last through the weekend with millions of Americans set to experience triple-digit heat

More than 85% of Americans are bracing for temperatures above 90 degrees Fahrenheit through the weekend, with millions in the south-central US expected to experience readings in the triple digits.