NASHVILLE (AP) — Weather forecasters are urging caution as the heat builds across Tennessee this week.
The National Weather Service anticipates heat indexes as high as 116 degrees on Wednesday and Thursday afternoon in the Mississippi River Valley. The index is a combination of temperature and humidity.
An excessive heat warning is in effect for nine Tennessee counties closest to the river and includes the cities of Union City, Dyersburg, Covington, Bartlett, Germantown, Collierville, Memphis, Millington and Somerville.
A heat advisory was posted for the remainder of West Tennessee. An air quality alert was issued for the Knoxville metro area and the Great Smoky Mountains.
Temperatures of 100 degrees and above are expected in Memphis at midweek while upper 90s readings are forecast for Nashville and Chattanooga.