NASA map captures extent of punishing heat in U.S.

The U.S. has contended with unrelenting temperatures this summer, and a map from NASA paints a dire picture of the scale of those persistent heat waves.The map, which consists of a snapshot of temperatures nationwide for July 10, used satellite images — along with a complex mathematical model known as the Goddard Earth Observing System — to create a kind of color code, with dark red showing areas that reached highs of 104 degrees Fahrenheit, according to the NASA Earth Observatory, a