A heat advisory is back in effect today for the four states.

The advisory for southeast Kansas starts at noon and continues until 8 p.m. A heat index up to 108 is possible. For southwest Missouri, the advisory starts at noon and continues until 7 p.m. In Oklahoma and Arkansas, the advisory runs from noon through 9 p.m. Parts of northeast Oklahoma including Tulsa will also be in an excessive heat warning today with a heat index up to 114. The National Weather Service says to limit strenuous activities, stay hydrated and take frequent breaks when working outside.