Other bad-sleep states included Tennessee, with 14.8% having been sleep deprived for the past month; Kentucky, with 14.4%; and Oklahoma, with 14.3%.

The risk area was later revised southward to only include eastern Arkansas, western Tennessee, and northwestern Mississippi.

Eaton's authority ranged over an area that included not only Tennessee, but portions of Kentucky and Mississippi, as well.

The states on Toyota's list include Arkansas, North Carolina, Tennessee and Virginia.

Such states include Hawaii, Idaho, Pennsylvania, Rhode Island, Tennessee and Wyoming.

The warning also included eastern Tennessee.

These include Arizona, Kentucky, Michigan, Minnesota, South Carolina, and Tennessee.

The region includes Kentucky, Tennessee, Mississippi and Alabama.

Other areas it is found include Oklahoma, southeastern Iowa, central Kansas, Arkansas, Georgia, and western Tennessee.

These include West Virginia, Kentucky, Maine, Tennessee and Vermont.