Extreme heat and severe storms impact Southern and Eastern United States

A dangerous heat wave is affecting much of the Southern and Southeastern United States, with heat indices expected to reach as high as 115 degrees in some areas. In West Tennessee, the National Weather Service has issued an extreme heat warning through Sunday, forecasting heat indices at or above 107 degrees in Memphis. Urban areas may see little nighttime relief, with temperatures potentially remaining above 80 degrees Fahrenheit.

Simultaneously, parts of the Midwest, Ohio Valley, and Mid-Atlantic are facing unsettled weather. Heavy rain, flash flooding, and severe thunderstorms are expected, particularly in the central Appalachians and parts of eastern Tennessee and western North Carolina. While a surge of cooler Canadian air is expected to eventually bring relief to the northern United States, the immediate threat includes damaging wind gusts and torrential rain in storm-prone regions.

Data from Climate Central indicates that human-caused climate change has made extreme overnight temperatures approximately three times more likely across much of the contiguous United States. In Tennessee, cities like Nashville and Chattanooga have seen significant increases in unusually warm summer nights since 1970.