Kentucky shares hottest heat indices in the U.S.

At 6 p.m. Wednesday, the National Weather Service office at Barkley Field posted a heat index reading of 112 to go along with an air temperature of 94 degrees.

Only the Mojave Desert (115) and the Texas-Mexico border (113) had a higher number on the heat index map.

Tuesday was the hottest day of the year in Texas and Oklahoma, including a temperature of 116 in Norman and 109 in Dallas.

More than 100 million Americans were suffering under some form of heat advisory on Wednesday, and the extreme temperatures aren't going away soon.

Thursday's high in Paducah is expected to be 95, and Friday could hit 100. Saturday and Sunday will also probably be in triple digits, and Monday's high so far is posted at 98. Highs will remain well into the 90s for much of next week.

Paducah's normal daily high for this week in July is 90.