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The Obamas will speak on Night 2 of the DNC.
Even by desert standards, the prolonged baking that Nevada's largest city is experiencing is nearly unprecedented.
Adventurers are still being drawn to Death Valley, even though the desolate region known as one of the hottest places is being punished by dangerous heat.
In Multnomah County, health officials are investigating multiple deaths believed to be heat-related.
Roughly 130 million people were under threat Saturday and into next week from a long-running heat wave that already has broken records.
A slow-moving and potentially record-setting heat wave is spreading across the Western U.S., the National Weather Service said.
Around 134 million people in the U.S. are under alerts as an "extremely dangerous and record-breaking" heat wave broils much of the country.
A heat wave hit the DMV area over the weekend, and one of the country's Founding Fathers paid the price.
A railroad bridge collapsed during flooding in the Midwestern U.S. that has led to water rescues, evacuations and at least one death.