A heat wave is underway across parts of the country, but some states had their hottest day on record decades ago.

Kentucky records - All-time highest temperature: 114° F (Greensburg on July 28, 1930) - All-time lowest temperature: -37° F ...

Missouri records - All-time highest temperature: 118° F (Union on July 14, 1954) - All-time lowest temperature: -40° F ...